/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 NUM_FUNCTIONS --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_25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:27:05,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:27:05,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:27:05,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:27:05,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:27:05,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:27:05,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:27:05,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:27:05,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:27:05,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:27:05,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:27:05,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:27:05,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:27:05,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:27:05,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:27:05,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:27:05,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:27:05,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:27:05,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:27:05,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:27:05,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:27:05,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:27:05,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:27:05,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:27:05,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:27:05,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:27:05,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:27:05,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:27:05,894 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 [2020-07-20 13:27:05,911 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:27:05,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:27:05,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:27:05,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:27:05,913 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:27:05,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:27:05,914 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:27:05,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:27:05,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:27:05,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:27:05,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:27:05,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:27:05,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:27:05,915 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:27:05,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:27:05,916 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:27:05,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:27:05,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:27:05,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:27:05,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:27:05,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:27:05,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:27:05,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:27:05,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:27:05,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:27:05,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:27:05,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:05,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:27:05,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:27:05,918 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 -> NUM_FUNCTIONS 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 [2020-07-20 13:27:06,230 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:27:06,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:27:06,247 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:27:06,249 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:27:06,249 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:27:06,250 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c [2020-07-20 13:27:06,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6881fea74/8cd6fe16675a4a648fa20b276d59392b/FLAG60bf338d8 [2020-07-20 13:27:06,751 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:27:06,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c [2020-07-20 13:27:06,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6881fea74/8cd6fe16675a4a648fa20b276d59392b/FLAG60bf338d8 [2020-07-20 13:27:07,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6881fea74/8cd6fe16675a4a648fa20b276d59392b [2020-07-20 13:27:07,191 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:27:07,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:27:07,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:27:07,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:27:07,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:27:07,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:27:07" (1/1) ... [2020-07-20 13:27:07,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2d09fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:07, skipping insertion in model container [2020-07-20 13:27:07,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:27:07" (1/1) ... [2020-07-20 13:27:07,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:27:07,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:27:07,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:27:07,459 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:27:07,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:27:07,493 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:27:07,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:07 WrapperNode [2020-07-20 13:27:07,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:27:07,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:27:07,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:27:07,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:27:07,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:07" (1/1) ... [2020-07-20 13:27:07,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:07" (1/1) ... [2020-07-20 13:27:07,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:07" (1/1) ... [2020-07-20 13:27:07,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:07" (1/1) ... [2020-07-20 13:27:07,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:07" (1/1) ... [2020-07-20 13:27:07,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:07" (1/1) ... [2020-07-20 13:27:07,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:07" (1/1) ... [2020-07-20 13:27:07,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:27:07,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:27:07,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:27:07,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:27:07,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:07" (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 [2020-07-20 13:27:07,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:27:07,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:27:07,689 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 13:27:07,689 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 13:27:07,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:27:07,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:27:07,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:27:07,690 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 13:27:07,690 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 13:27:07,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:27:07,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:27:07,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:27:07,887 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:27:07,888 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:27:07,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:27:07 BoogieIcfgContainer [2020-07-20 13:27:07,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:27:07,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:27:07,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:27:07,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:27:07,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:27:07" (1/3) ... [2020-07-20 13:27:07,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffb56ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:27:07, skipping insertion in model container [2020-07-20 13:27:07,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:07" (2/3) ... [2020-07-20 13:27:07,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffb56ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:27:07, skipping insertion in model container [2020-07-20 13:27:07,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:27:07" (3/3) ... [2020-07-20 13:27:07,900 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-1.c [2020-07-20 13:27:07,911 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:27:07,917 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:27:07,932 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:27:07,956 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:27:07,956 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:27:07,956 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:27:07,957 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:27:07,957 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:27:07,957 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:27:07,957 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:27:07,957 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:27:07,973 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 13:27:07,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:27:07,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:07,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:27:07,981 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:07,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 13:27:07,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:07,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981419779] [2020-07-20 13:27:07,994 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 [2020-07-20 13:27:08,062 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:08,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:08,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:27:08,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:27:08,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:27:08,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981419779] [2020-07-20 13:27:08,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:27:08,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:27:08,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943623898] [2020-07-20 13:27:08,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:27:08,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:08,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:27:08,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:27:08,207 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 13:27:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:08,334 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 13:27:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:27:08,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 13:27:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:08,348 INFO L225 Difference]: With dead ends: 44 [2020-07-20 13:27:08,349 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 13:27:08,352 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 [2020-07-20 13:27:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 13:27:08,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 13:27:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:27:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 13:27:08,403 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 13:27:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:08,403 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 13:27:08,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:27:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 13:27:08,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:27:08,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:08,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:27:08,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:08,623 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:08,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 13:27:08,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:08,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377868513] [2020-07-20 13:27:08,626 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 [2020-07-20 13:27:08,663 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:08,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:27:08,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:27:08,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:27:08,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377868513] [2020-07-20 13:27:08,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:27:08,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:27:08,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743784732] [2020-07-20 13:27:08,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:27:08,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:08,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:27:08,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:27:08,714 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 13:27:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:08,785 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 13:27:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:27:08,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 13:27:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:08,788 INFO L225 Difference]: With dead ends: 36 [2020-07-20 13:27:08,789 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 13:27:08,790 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 [2020-07-20 13:27:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 13:27:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 13:27:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:27:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 13:27:08,801 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 13:27:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:08,801 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 13:27:08,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:27:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 13:27:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 13:27:08,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:08,804 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] [2020-07-20 13:27:09,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:09,018 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:09,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:09,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 13:27:09,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:09,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479401511] [2020-07-20 13:27:09,021 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 [2020-07-20 13:27:09,066 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:09,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:09,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:27:09,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:27:09,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:09,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:09,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:27:09,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479401511] [2020-07-20 13:27:09,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:09,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 13:27:09,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772760546] [2020-07-20 13:27:09,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:27:09,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:09,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:27:09,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:27:09,383 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 13:27:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:09,504 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 13:27:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:27:09,505 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 13:27:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:09,507 INFO L225 Difference]: With dead ends: 41 [2020-07-20 13:27:09,508 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 13:27:09,508 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 [2020-07-20 13:27:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 13:27:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 13:27:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 13:27:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 13:27:09,521 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 13:27:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:09,521 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 13:27:09,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:27:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 13:27:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:27:09,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:09,524 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] [2020-07-20 13:27:09,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:09,738 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:09,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:09,739 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 13:27:09,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:09,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470823487] [2020-07-20 13:27:09,740 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 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 [2020-07-20 13:27:09,770 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:09,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:09,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:27:09,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:27:09,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:09,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:09,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:27:10,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470823487] [2020-07-20 13:27:10,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:10,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 13:27:10,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740958465] [2020-07-20 13:27:10,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:27:10,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:10,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:27:10,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:27:10,048 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 13:27:10,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:10,190 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 13:27:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:27:10,191 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 13:27:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:10,194 INFO L225 Difference]: With dead ends: 46 [2020-07-20 13:27:10,194 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 13:27:10,195 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 [2020-07-20 13:27:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 13:27:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 13:27:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 13:27:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 13:27:10,219 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 13:27:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:10,219 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 13:27:10,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:27:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 13:27:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 13:27:10,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:10,225 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] [2020-07-20 13:27:10,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:10,434 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:10,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:10,435 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 13:27:10,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:10,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18682259] [2020-07-20 13:27:10,437 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 [2020-07-20 13:27:10,472 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:10,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:10,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:27:10,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 13:27:10,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:10,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:10,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:10,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:27:10,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18682259] [2020-07-20 13:27:10,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:10,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 13:27:10,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585412667] [2020-07-20 13:27:10,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 13:27:10,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:10,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 13:27:10,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:27:10,926 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 13:27:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:11,114 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 13:27:11,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:27:11,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 13:27:11,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:11,116 INFO L225 Difference]: With dead ends: 51 [2020-07-20 13:27:11,117 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 13:27:11,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:27:11,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 13:27:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 13:27:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 13:27:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 13:27:11,128 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 13:27:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:11,129 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 13:27:11,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 13:27:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 13:27:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 13:27:11,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:11,131 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] [2020-07-20 13:27:11,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:11,347 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:11,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:11,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 13:27:11,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:11,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45523491] [2020-07-20 13:27:11,350 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 [2020-07-20 13:27:11,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:11,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:27:11,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 13:27:11,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:11,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:11,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:11,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:27:11,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45523491] [2020-07-20 13:27:11,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:11,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 13:27:11,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027206612] [2020-07-20 13:27:11,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 13:27:11,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:11,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 13:27:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:27:11,747 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 13:27:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:11,914 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 13:27:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:27:11,915 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 13:27:11,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:11,917 INFO L225 Difference]: With dead ends: 56 [2020-07-20 13:27:11,917 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 13:27:11,918 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 [2020-07-20 13:27:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 13:27:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 13:27:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 13:27:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 13:27:11,930 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 13:27:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:11,930 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 13:27:11,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 13:27:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 13:27:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 13:27:11,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:11,936 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] [2020-07-20 13:27:12,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:12,151 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:12,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:12,152 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 13:27:12,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:12,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351238294] [2020-07-20 13:27:12,153 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 [2020-07-20 13:27:12,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:12,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:27:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 13:27:12,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:12,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:12,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:12,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:12,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 13:27:12,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351238294] [2020-07-20 13:27:12,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:12,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 13:27:12,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450918735] [2020-07-20 13:27:12,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 13:27:12,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:12,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 13:27:12,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:27:12,882 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 13:27:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:13,084 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 13:27:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:27:13,084 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 13:27:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:13,087 INFO L225 Difference]: With dead ends: 61 [2020-07-20 13:27:13,087 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 13:27:13,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:27:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 13:27:13,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 13:27:13,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 13:27:13,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 13:27:13,099 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 13:27:13,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:13,099 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 13:27:13,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 13:27:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 13:27:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 13:27:13,102 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:13,103 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] [2020-07-20 13:27:13,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:13,312 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:13,313 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 13:27:13,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:13,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360708909] [2020-07-20 13:27:13,315 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 [2020-07-20 13:27:13,352 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:13,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:27:13,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 13:27:13,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:13,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:13,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:13,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:13,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:13,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 13:27:13,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360708909] [2020-07-20 13:27:13,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:13,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 13:27:13,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996746885] [2020-07-20 13:27:13,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 13:27:13,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:13,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 13:27:13,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:27:13,970 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-20 13:27:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:14,181 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 13:27:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:27:14,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 13:27:14,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:14,185 INFO L225 Difference]: With dead ends: 66 [2020-07-20 13:27:14,185 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 13:27:14,186 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 [2020-07-20 13:27:14,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 13:27:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 13:27:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 13:27:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 13:27:14,197 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 13:27:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:14,198 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 13:27:14,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 13:27:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 13:27:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 13:27:14,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:14,200 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] [2020-07-20 13:27:14,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:14,414 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:14,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:14,415 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 13:27:14,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:14,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955345760] [2020-07-20 13:27:14,417 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 [2020-07-20 13:27:14,476 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:14,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:27:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 13:27:14,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:15,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:15,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:15,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:15,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:15,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:15,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:15,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 13:27:15,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955345760] [2020-07-20 13:27:15,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:15,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 13:27:15,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164284354] [2020-07-20 13:27:15,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 13:27:15,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:15,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 13:27:15,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:27:15,499 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-20 13:27:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:15,751 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 13:27:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:27:15,752 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-20 13:27:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:15,754 INFO L225 Difference]: With dead ends: 71 [2020-07-20 13:27:15,755 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 13:27:15,756 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 [2020-07-20 13:27:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 13:27:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 13:27:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 13:27:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 13:27:15,781 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 13:27:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:15,781 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 13:27:15,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 13:27:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 13:27:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 13:27:15,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:15,784 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] [2020-07-20 13:27:15,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:15,998 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:15,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 13:27:16,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:16,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406840597] [2020-07-20 13:27:16,001 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 [2020-07-20 13:27:16,082 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:16,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:16,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:27:16,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 13:27:16,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:16,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:16,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:17,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:17,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 13:27:17,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406840597] [2020-07-20 13:27:17,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:17,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 13:27:17,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589929853] [2020-07-20 13:27:17,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 13:27:17,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:17,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 13:27:17,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 13:27:17,123 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-20 13:27:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:17,357 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-20 13:27:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:27:17,358 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-20 13:27:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:17,360 INFO L225 Difference]: With dead ends: 76 [2020-07-20 13:27:17,360 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 13:27:17,362 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 [2020-07-20 13:27:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 13:27:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 13:27:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 13:27:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 13:27:17,386 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-20 13:27:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:17,387 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 13:27:17,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 13:27:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 13:27:17,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 13:27:17,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:17,394 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] [2020-07-20 13:27:17,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:17,608 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:17,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:17,609 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-20 13:27:17,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:17,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446980607] [2020-07-20 13:27:17,611 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 [2020-07-20 13:27:17,704 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:17,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:27:17,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-20 13:27:17,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:18,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:19,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:19,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:19,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:19,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:19,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:19,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:19,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-20 13:27:19,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446980607] [2020-07-20 13:27:19,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:19,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 13:27:19,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724027447] [2020-07-20 13:27:19,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:27:19,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:19,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:27:19,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:27:19,459 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-20 13:27:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:19,719 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-20 13:27:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:27:19,720 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-20 13:27:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:19,724 INFO L225 Difference]: With dead ends: 81 [2020-07-20 13:27:19,725 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 13:27:19,726 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 [2020-07-20 13:27:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 13:27:19,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-20 13:27:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 13:27:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 13:27:19,736 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-20 13:27:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:19,737 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 13:27:19,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:27:19,737 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 13:27:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 13:27:19,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:19,739 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] [2020-07-20 13:27:19,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:19,953 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:19,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:19,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-20 13:27:19,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:19,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836011427] [2020-07-20 13:27:19,955 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 [2020-07-20 13:27:20,030 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:20,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:20,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:27:20,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-20 13:27:20,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:20,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:21,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:21,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:21,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:21,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:21,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:21,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-20 13:27:21,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836011427] [2020-07-20 13:27:21,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:21,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 13:27:21,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039335211] [2020-07-20 13:27:21,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 13:27:21,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:21,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 13:27:21,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:27:21,525 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-20 13:27:21,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:21,833 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-20 13:27:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:27:21,834 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-20 13:27:21,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:21,838 INFO L225 Difference]: With dead ends: 86 [2020-07-20 13:27:21,838 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 13:27:21,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:27:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 13:27:21,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-20 13:27:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 13:27:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 13:27:21,851 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-20 13:27:21,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:21,852 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 13:27:21,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 13:27:21,852 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 13:27:21,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-20 13:27:21,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:21,871 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] [2020-07-20 13:27:22,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:22,087 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:22,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-20 13:27:22,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:22,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50826079] [2020-07-20 13:27:22,089 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 [2020-07-20 13:27:22,208 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:22,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:22,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:27:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-20 13:27:22,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:23,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:23,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-20 13:27:24,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50826079] [2020-07-20 13:27:24,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:24,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 13:27:24,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392244586] [2020-07-20 13:27:24,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:27:24,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:24,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:27:24,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:27:24,670 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-20 13:27:25,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:25,074 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-20 13:27:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:27:25,075 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-20 13:27:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:25,078 INFO L225 Difference]: With dead ends: 91 [2020-07-20 13:27:25,078 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 13:27:25,080 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 [2020-07-20 13:27:25,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 13:27:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-20 13:27:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 13:27:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 13:27:25,090 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-20 13:27:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:25,091 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 13:27:25,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:27:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 13:27:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 13:27:25,094 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:25,094 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] [2020-07-20 13:27:25,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:25,308 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:25,309 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-20 13:27:25,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:25,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391076250] [2020-07-20 13:27:25,310 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 [2020-07-20 13:27:25,439 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:25,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:25,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:27:25,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-20 13:27:25,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:26,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:27,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:27,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:27,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:27,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:27,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:27,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:27,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-20 13:27:28,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391076250] [2020-07-20 13:27:28,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:28,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 13:27:28,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605934398] [2020-07-20 13:27:28,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 13:27:28,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:28,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 13:27:28,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:27:28,005 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-20 13:27:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:28,337 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-20 13:27:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:27:28,338 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-20 13:27:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:28,340 INFO L225 Difference]: With dead ends: 96 [2020-07-20 13:27:28,340 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 13:27:28,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:27:28,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 13:27:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-20 13:27:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 13:27:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 13:27:28,356 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-20 13:27:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:28,358 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 13:27:28,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 13:27:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 13:27:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 13:27:28,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:28,364 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] [2020-07-20 13:27:28,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:28,578 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:28,579 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-20 13:27:28,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:28,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188087015] [2020-07-20 13:27:28,580 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 [2020-07-20 13:27:28,770 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:28,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:28,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 13:27:28,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-20 13:27:28,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:30,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:30,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:31,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:31,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:32,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:32,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:32,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:32,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:32,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:32,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:32,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-20 13:27:32,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188087015] [2020-07-20 13:27:32,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:32,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-20 13:27:32,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154725734] [2020-07-20 13:27:32,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:27:32,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:32,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:27:32,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:27:32,706 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-20 13:27:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:33,207 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-20 13:27:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:27:33,208 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-20 13:27:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:33,214 INFO L225 Difference]: With dead ends: 101 [2020-07-20 13:27:33,214 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 13:27:33,215 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 [2020-07-20 13:27:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 13:27:33,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-20 13:27:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 13:27:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 13:27:33,232 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-20 13:27:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:33,233 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 13:27:33,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:27:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 13:27:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 13:27:33,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:33,242 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] [2020-07-20 13:27:33,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:33,456 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:33,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-20 13:27:33,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:33,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527425747] [2020-07-20 13:27:33,458 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 [2020-07-20 13:27:33,659 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:33,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:33,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 13:27:33,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-20 13:27:33,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:35,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:35,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:36,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:37,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:37,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:37,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:37,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:37,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:37,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-20 13:27:37,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527425747] [2020-07-20 13:27:37,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:37,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-20 13:27:37,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591191172] [2020-07-20 13:27:37,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 13:27:37,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:37,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 13:27:37,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-20 13:27:37,733 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-20 13:27:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:38,221 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-20 13:27:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:27:38,222 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-20 13:27:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:38,225 INFO L225 Difference]: With dead ends: 106 [2020-07-20 13:27:38,226 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 13:27:38,228 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 [2020-07-20 13:27:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 13:27:38,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-20 13:27:38,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 13:27:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 13:27:38,250 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-20 13:27:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:38,252 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 13:27:38,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 13:27:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 13:27:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-20 13:27:38,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:38,261 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] [2020-07-20 13:27:38,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:38,476 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:38,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-20 13:27:38,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:38,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746973153] [2020-07-20 13:27:38,477 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 [2020-07-20 13:27:38,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:38,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:38,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:27:38,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-20 13:27:39,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:43,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:44,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:45,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:45,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:45,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:45,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:45,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:45,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:46,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:46,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:46,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:46,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-20 13:27:46,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746973153] [2020-07-20 13:27:46,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:46,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-20 13:27:46,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564528292] [2020-07-20 13:27:46,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 13:27:46,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:46,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 13:27:46,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:27:46,612 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-20 13:27:47,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:47,192 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-20 13:27:47,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 13:27:47,193 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-20 13:27:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:47,196 INFO L225 Difference]: With dead ends: 111 [2020-07-20 13:27:47,196 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 13:27:47,199 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 [2020-07-20 13:27:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 13:27:47,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-20 13:27:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 13:27:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-20 13:27:47,213 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-20 13:27:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:47,214 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-20 13:27:47,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 13:27:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-20 13:27:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-20 13:27:47,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:47,218 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] [2020-07-20 13:27:47,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:47,433 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-20 13:27:47,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:47,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604954847] [2020-07-20 13:27:47,434 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 [2020-07-20 13:27:47,736 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:47,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:47,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:27:47,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-20 13:27:47,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:50,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:51,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:51,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:52,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:52,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:53,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:53,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:53,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:53,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:53,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:53,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-20 13:27:53,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604954847] [2020-07-20 13:27:53,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:53,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-20 13:27:53,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547663560] [2020-07-20 13:27:53,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 13:27:53,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:53,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 13:27:53,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-20 13:27:53,524 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 24 states. [2020-07-20 13:27:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:54,133 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-20 13:27:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 13:27:54,138 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 418 [2020-07-20 13:27:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:54,141 INFO L225 Difference]: With dead ends: 116 [2020-07-20 13:27:54,142 INFO L226 Difference]: Without dead ends: 112 [2020-07-20 13:27:54,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 13:27:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-20 13:27:54,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-20 13:27:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 13:27:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-20 13:27:54,155 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-20 13:27:54,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:54,156 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-20 13:27:54,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 13:27:54,156 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-20 13:27:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2020-07-20 13:27:54,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:54,162 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] [2020-07-20 13:27:54,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:54,377 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:54,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1563866591, now seen corresponding path program 8 times [2020-07-20 13:27:54,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:54,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244880855] [2020-07-20 13:27:54,378 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 [2020-07-20 13:27:54,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:54,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:54,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 13:27:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2323 refuted. 0 times theorem prover too weak. 14314 trivial. 0 not checked. [2020-07-20 13:27:55,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:59,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:59,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:00,636 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 13:28:00,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:00,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:02,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:02,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:02,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:03,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:03,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:03,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:03,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:03,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:03,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:04,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:04,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2375 refuted. 0 times theorem prover too weak. 14262 trivial. 0 not checked. [2020-07-20 13:28:04,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244880855] [2020-07-20 13:28:04,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:28:04,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-20 13:28:04,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014161989] [2020-07-20 13:28:04,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 13:28:04,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:28:04,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 13:28:04,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:28:04,302 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 26 states. [2020-07-20 13:28:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:28:04,952 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-20 13:28:04,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 13:28:04,957 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 741 [2020-07-20 13:28:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:28:04,961 INFO L225 Difference]: With dead ends: 121 [2020-07-20 13:28:04,961 INFO L226 Difference]: Without dead ends: 117 [2020-07-20 13:28:04,963 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 [2020-07-20 13:28:04,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-20 13:28:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-20 13:28:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 13:28:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-20 13:28:04,977 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 741 [2020-07-20 13:28:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:28:04,978 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-20 13:28:04,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 13:28:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-20 13:28:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-20 13:28:04,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:28:04,987 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] [2020-07-20 13:28:05,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:28:05,202 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:28:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:28:05,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2100501163, now seen corresponding path program 4 times [2020-07-20 13:28:05,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:28:05,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000521748] [2020-07-20 13:28:05,205 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 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 [2020-07-20 13:28:05,720 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:28:05,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:28:05,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 13:28:05,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:28:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2821 refuted. 0 times theorem prover too weak. 19575 trivial. 0 not checked. [2020-07-20 13:28:06,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:28:10,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:10,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:12,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:13,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:13,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:14,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:15,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:15,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:15,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:15,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:15,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:15,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2877 refuted. 0 times theorem prover too weak. 19519 trivial. 0 not checked. [2020-07-20 13:28:16,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000521748] [2020-07-20 13:28:16,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:28:16,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-20 13:28:16,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74907414] [2020-07-20 13:28:16,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 13:28:16,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:28:16,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 13:28:16,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:28:16,213 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 26 states. [2020-07-20 13:28:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:28:16,936 INFO L93 Difference]: Finished difference Result 126 states and 350 transitions. [2020-07-20 13:28:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 13:28:16,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 871 [2020-07-20 13:28:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:28:16,941 INFO L225 Difference]: With dead ends: 126 [2020-07-20 13:28:16,941 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 13:28:16,942 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 [2020-07-20 13:28:16,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 13:28:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-20 13:28:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 13:28:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-20 13:28:16,956 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 871 [2020-07-20 13:28:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:28:16,957 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-20 13:28:16,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 13:28:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-20 13:28:16,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-07-20 13:28:16,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:28:16,980 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] [2020-07-20 13:28:17,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:28:17,194 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:28:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:28:17,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1326645612, now seen corresponding path program 9 times [2020-07-20 13:28:17,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:28:17,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905392170] [2020-07-20 13:28:17,195 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 [2020-07-20 13:28:17,933 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:28:17,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:28:17,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 3073 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 13:28:17,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:28:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6392 refuted. 0 times theorem prover too weak. 81780 trivial. 0 not checked. [2020-07-20 13:28:19,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:28:21,893 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 13:28:28,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:28,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:31,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:33,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:34,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:35,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:35,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:36,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:37,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:37,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:37,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:37,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:37,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:37,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6457 refuted. 0 times theorem prover too weak. 81715 trivial. 0 not checked. [2020-07-20 13:28:38,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905392170] [2020-07-20 13:28:38,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:28:38,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-20 13:28:38,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677700122] [2020-07-20 13:28:38,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 13:28:38,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:28:38,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 13:28:38,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-20 13:28:38,527 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 28 states. [2020-07-20 13:28:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:28:39,505 INFO L93 Difference]: Finished difference Result 131 states and 376 transitions. [2020-07-20 13:28:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 13:28:39,507 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1690 [2020-07-20 13:28:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:28:39,512 INFO L225 Difference]: With dead ends: 131 [2020-07-20 13:28:39,512 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 13:28:39,513 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 [2020-07-20 13:28:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 13:28:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2020-07-20 13:28:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 13:28:39,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-20 13:28:39,528 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1690 [2020-07-20 13:28:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:28:39,529 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-20 13:28:39,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 13:28:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-20 13:28:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1433 [2020-07-20 13:28:39,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:28:39,548 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] [2020-07-20 13:28:39,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:28:39,763 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:28:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:28:39,764 INFO L82 PathProgramCache]: Analyzing trace with hash -37703149, now seen corresponding path program 5 times [2020-07-20 13:28:39,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:28:39,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243188666] [2020-07-20 13:28:39,765 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 [2020-07-20 13:28:40,484 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:28:40,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:28:40,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 2592 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 13:28:40,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:28:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5319 refuted. 0 times theorem prover too weak. 56349 trivial. 0 not checked. [2020-07-20 13:28:41,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:28:48,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:48,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:51,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:51,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:54,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:54,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:55,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:56,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:57,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:58,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:58,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:58,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:58,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:58,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5389 refuted. 0 times theorem prover too weak. 56279 trivial. 0 not checked. [2020-07-20 13:28:59,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243188666] [2020-07-20 13:28:59,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:28:59,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-20 13:28:59,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875815321] [2020-07-20 13:28:59,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 13:28:59,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:28:59,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 13:28:59,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-20 13:28:59,516 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 28 states. [2020-07-20 13:29:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:29:00,479 INFO L93 Difference]: Finished difference Result 136 states and 404 transitions. [2020-07-20 13:29:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 13:29:00,483 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1432 [2020-07-20 13:29:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:29:00,486 INFO L225 Difference]: With dead ends: 136 [2020-07-20 13:29:00,486 INFO L226 Difference]: Without dead ends: 132 [2020-07-20 13:29:00,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2875 GetRequests, 2816 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 13:29:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-20 13:29:00,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-07-20 13:29:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 13:29:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-20 13:29:00,504 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1432 [2020-07-20 13:29:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:29:00,505 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-20 13:29:00,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 13:29:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-20 13:29:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1990 [2020-07-20 13:29:00,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:29:00,536 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] [2020-07-20 13:29:00,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:29:00,750 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:29:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:29:00,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1412849447, now seen corresponding path program 10 times [2020-07-20 13:29:00,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:29:00,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168098549] [2020-07-20 13:29:00,753 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 [2020-07-20 13:29:01,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:29:01,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:29:01,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 3616 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:29:01,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:29:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8137 refuted. 0 times theorem prover too weak. 114500 trivial. 0 not checked. [2020-07-20 13:29:03,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:29:07,531 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 13:29:16,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:16,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:21,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:25,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:25,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:28,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:30,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:31,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:31,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:32,544 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 13:29:32,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:32,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:33,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:33,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:33,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:33,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:33,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8217 refuted. 0 times theorem prover too weak. 114420 trivial. 0 not checked. [2020-07-20 13:29:35,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168098549] [2020-07-20 13:29:35,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:29:35,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-20 13:29:35,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330580364] [2020-07-20 13:29:35,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 13:29:35,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:29:35,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 13:29:35,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:29:35,393 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 30 states. [2020-07-20 13:29:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:29:37,167 INFO L93 Difference]: Finished difference Result 141 states and 432 transitions. [2020-07-20 13:29:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 13:29:37,171 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1989 [2020-07-20 13:29:37,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:29:37,174 INFO L225 Difference]: With dead ends: 141 [2020-07-20 13:29:37,174 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 13:29:37,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3991 GetRequests, 3927 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 13:29:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 13:29:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-20 13:29:37,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 13:29:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-20 13:29:37,192 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 1989 [2020-07-20 13:29:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:29:37,194 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-20 13:29:37,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 13:29:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-20 13:29:37,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2050 [2020-07-20 13:29:37,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:29:37,228 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] [2020-07-20 13:29:37,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:29:37,434 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:29:37,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:29:37,436 INFO L82 PathProgramCache]: Analyzing trace with hash 266934567, now seen corresponding path program 5 times [2020-07-20 13:29:37,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:29:37,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266909036] [2020-07-20 13:29:37,437 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 [2020-07-20 13:29:38,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:29:38,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:29:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 3712 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:29:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:29:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8506 refuted. 0 times theorem prover too weak. 119697 trivial. 0 not checked. [2020-07-20 13:29:40,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:29:44,449 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:29:44,562 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:29:44,673 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 13:29:44,777 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 13:29:44,884 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 13:29:53,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:53,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:57,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:02,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:02,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:05,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:08,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:08,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:09,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:10,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:11,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:11,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:11,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:11,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:11,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:30:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8591 refuted. 0 times theorem prover too weak. 119612 trivial. 0 not checked. [2020-07-20 13:30:13,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266909036] [2020-07-20 13:30:13,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:30:13,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-20 13:30:13,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277709021] [2020-07-20 13:30:13,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 13:30:13,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:30:13,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 13:30:13,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-20 13:30:13,218 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 30 states. [2020-07-20 13:30:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:30:15,188 INFO L93 Difference]: Finished difference Result 146 states and 462 transitions. [2020-07-20 13:30:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 13:30:15,191 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 2049 [2020-07-20 13:30:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:30:15,196 INFO L225 Difference]: With dead ends: 146 [2020-07-20 13:30:15,197 INFO L226 Difference]: Without dead ends: 142 [2020-07-20 13:30:15,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4046 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 13:30:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-20 13:30:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-07-20 13:30:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 13:30:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-20 13:30:15,217 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 2049 [2020-07-20 13:30:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:30:15,219 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-20 13:30:15,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 13:30:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-20 13:30:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3680 [2020-07-20 13:30:15,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:30:15,337 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] [2020-07-20 13:30:15,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:30:15,553 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:30:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:30:15,555 INFO L82 PathProgramCache]: Analyzing trace with hash -886096047, now seen corresponding path program 11 times [2020-07-20 13:30:15,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:30:15,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142424051] [2020-07-20 13:30:15,557 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 [2020-07-20 13:30:17,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:30:17,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:30:17,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 6678 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 13:30:17,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:30:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16770 refuted. 0 times theorem prover too weak. 408925 trivial. 0 not checked. [2020-07-20 13:30:22,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:30:26,167 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:30:26,277 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:30:26,394 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:30:26,509 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:30:27,617 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:30:27,743 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:30:27,871 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:30:28,001 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:30:30,138 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:30:30,273 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:30:30,414 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:30:30,559 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:30:30,701 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 13:30:30,833 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 13:30:30,959 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 13:30:31,078 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 13:30:31,193 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:30:31,313 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 13:30:41,618 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 13:30:51,304 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:30:52,017 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:30:52,138 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:30:52,250 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:30:52,366 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:30:53,474 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:30:53,585 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:30:53,714 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:30:53,853 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:30:53,987 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 13:30:54,097 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 13:30:54,204 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:30:54,401 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:30:55,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:04,406 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:31:04,612 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:31:04,716 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:31:05,809 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:31:06,023 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:31:06,127 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:31:06,795 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:31:06,912 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:31:07,030 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:31:07,144 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:31:07,267 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:31:07,374 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 13:31:07,495 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:31:07,609 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 13:31:07,721 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 13:31:08,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:15,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:15,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:22,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:26,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:26,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:27,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:29,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:29,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:29,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:30,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:30,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:31,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:31,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:31:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16866 refuted. 0 times theorem prover too weak. 408829 trivial. 0 not checked. [2020-07-20 13:31:35,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142424051] [2020-07-20 13:31:35,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:31:35,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-20 13:31:35,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777722320] [2020-07-20 13:31:35,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 13:31:35,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:31:35,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 13:31:35,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-20 13:31:35,454 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 32 states. [2020-07-20 13:31:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:31:37,804 INFO L93 Difference]: Finished difference Result 151 states and 492 transitions. [2020-07-20 13:31:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 13:31:37,807 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3679 [2020-07-20 13:31:37,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:31:37,814 INFO L225 Difference]: With dead ends: 151 [2020-07-20 13:31:37,814 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 13:31:37,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7372 GetRequests, 7303 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 13:31:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 13:31:37,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2020-07-20 13:31:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 13:31:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-20 13:31:37,837 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3679 [2020-07-20 13:31:37,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:31:37,840 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-20 13:31:37,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 13:31:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-20 13:31:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3365 [2020-07-20 13:31:37,956 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:31:37,958 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] [2020-07-20 13:31:38,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:31:38,172 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:31:38,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:31:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash 147049693, now seen corresponding path program 6 times [2020-07-20 13:31:38,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:31:38,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478033724] [2020-07-20 13:31:38,174 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 [2020-07-20 13:31:39,838 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:31:39,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:31:39,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 6085 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 13:31:39,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:31:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15526 refuted. 0 times theorem prover too weak. 332578 trivial. 0 not checked. [2020-07-20 13:31:43,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:31:47,234 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:31:47,341 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:31:47,457 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:31:47,572 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:31:49,304 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:31:49,422 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:31:49,549 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:31:49,673 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:31:50,976 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:31:51,110 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:31:51,247 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:31:51,387 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:31:53,159 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:31:53,305 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:31:53,461 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:31:53,614 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:31:53,767 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 13:31:53,907 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 13:31:54,046 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 13:31:54,175 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 13:31:54,302 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:31:54,420 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 13:31:54,532 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:31:54,638 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 13:32:08,932 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:32:09,702 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:32:09,804 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:32:11,165 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:32:11,276 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:32:11,398 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:32:11,510 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:32:12,862 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:32:13,000 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:32:13,148 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:32:13,298 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:32:13,440 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 13:32:13,571 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 13:32:13,698 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 13:32:13,817 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 13:32:13,929 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:32:14,038 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:32:14,141 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 13:32:14,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:32:14,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:32:26,048 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:32:26,157 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:32:26,704 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:32:26,824 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:32:26,947 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:32:28,688 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:32:28,810 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:32:28,934 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:32:29,060 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:32:29,194 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:32:29,317 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 13:32:29,436 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:32:29,548 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:32:29,655 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:32:30,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:32:45,277 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:32:45,486 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:32:45,597 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:32:46,178 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:32:46,295 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:32:46,419 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:32:46,542 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:32:46,661 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:32:46,770 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:32:46,879 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:32:46,983 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:32:47,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:32:47,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:32:53,085 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:32:53,190 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:32:53,302 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:32:53,410 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:32:53,522 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:32:54,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:32:54,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:33:00,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:33:02,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:33:04,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:33:06,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:33:06,788 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 13:33:07,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:33:07,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:33:08,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:33:08,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:33:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15628 refuted. 0 times theorem prover too weak. 332476 trivial. 0 not checked. [2020-07-20 13:33:12,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478033724] [2020-07-20 13:33:12,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:33:12,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-20 13:33:12,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76699719] [2020-07-20 13:33:12,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 13:33:12,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:33:12,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 13:33:12,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-20 13:33:12,052 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 32 states. [2020-07-20 13:33:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:33:14,644 INFO L93 Difference]: Finished difference Result 156 states and 524 transitions. [2020-07-20 13:33:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 13:33:14,648 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3364 [2020-07-20 13:33:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:33:14,655 INFO L225 Difference]: With dead ends: 156 [2020-07-20 13:33:14,655 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 13:33:14,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6741 GetRequests, 6672 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 13:33:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 13:33:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-20 13:33:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 13:33:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-20 13:33:14,678 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3364 [2020-07-20 13:33:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:33:14,680 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-20 13:33:14,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 13:33:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-20 13:33:14,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4616 [2020-07-20 13:33:14,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:33:14,808 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] [2020-07-20 13:33:15,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:33:15,009 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:33:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:33:15,011 INFO L82 PathProgramCache]: Analyzing trace with hash -554675479, now seen corresponding path program 12 times [2020-07-20 13:33:15,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:33:15,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554873232] [2020-07-20 13:33:15,012 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 [2020-07-20 13:33:17,024 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:33:17,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:33:17,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 8379 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 13:33:17,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:33:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 22920 refuted. 0 times theorem prover too weak. 665925 trivial. 0 not checked. [2020-07-20 13:33:24,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:33:27,050 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:33:27,155 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:33:27,738 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:33:30,611 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:33:30,718 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:33:30,840 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:33:30,951 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:33:32,111 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:33:32,229 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:33:32,352 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 13:33:32,474 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 13:33:34,197 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:33:34,325 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:33:34,459 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 13:33:34,593 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 13:33:34,728 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-20 13:33:34,866 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-20 13:33:35,021 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 13:33:35,163 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 13:33:35,301 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 13:33:35,432 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 13:33:35,558 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 13:33:35,681 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 13:33:35,796 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:33:35,899 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 13:33:52,897 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:33:53,000 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:33:54,771 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:33:54,884 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:33:54,998 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:33:55,110 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:33:56,320 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:33:56,439 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:33:56,565 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 13:33:56,692 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 13:33:56,816 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 13:33:56,930 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 13:33:57,041 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 13:33:57,145 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 13:33:58,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:08,483 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:34:08,599 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:34:08,722 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:34:08,846 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:34:09,921 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:34:10,056 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:34:10,201 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:34:10,351 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:34:13,301 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:34:13,449 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:34:13,605 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:34:13,759 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:34:13,910 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 13:34:14,059 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 13:34:14,185 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:34:14,304 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 13:34:14,410 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 13:34:14,517 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:34:14,627 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:34:14,729 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 13:34:15,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:41,060 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:34:41,668 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:34:41,781 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:34:41,904 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:34:42,023 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:34:42,769 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:34:42,897 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:34:43,032 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:34:43,166 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:34:44,462 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:34:44,603 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:34:44,770 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:34:44,921 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:34:45,063 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:34:45,210 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 13:34:45,339 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:34:45,462 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:34:45,574 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:34:45,680 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:34:46,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:55,607 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:34:55,712 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:34:56,215 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:34:56,332 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:34:56,452 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:34:56,571 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:34:57,326 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:34:57,459 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:34:57,632 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:34:57,784 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:34:57,914 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:34:58,032 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:34:58,143 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 13:34:58,248 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:34:58,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:04,779 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 13:35:05,014 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:35:05,129 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:35:05,678 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:35:05,787 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:35:05,907 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:35:06,022 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:35:06,170 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:35:06,320 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:35:06,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:11,410 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:35:11,513 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:35:12,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:12,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:16,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:19,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:21,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:22,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:22,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:23,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:23,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:23,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:35:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 23034 refuted. 0 times theorem prover too weak. 665811 trivial. 0 not checked. [2020-07-20 13:35:31,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554873232] [2020-07-20 13:35:31,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:35:31,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-20 13:35:31,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147217971] [2020-07-20 13:35:31,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 13:35:31,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:35:31,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 13:35:31,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 13:35:31,055 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 34 states. [2020-07-20 13:35:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:35:34,437 INFO L93 Difference]: Finished difference Result 161 states and 556 transitions. [2020-07-20 13:35:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 13:35:34,443 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 4615 [2020-07-20 13:35:34,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:35:34,449 INFO L225 Difference]: With dead ends: 161 [2020-07-20 13:35:34,449 INFO L226 Difference]: Without dead ends: 157 [2020-07-20 13:35:34,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9245 GetRequests, 9171 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 13:35:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-20 13:35:34,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-07-20 13:35:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 13:35:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-20 13:35:34,473 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 4615 [2020-07-20 13:35:34,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:35:34,477 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-20 13:35:34,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 13:35:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-20 13:35:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9330 [2020-07-20 13:35:34,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:35:34,919 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] [2020-07-20 13:35:35,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:35:35,126 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:35:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:35:35,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1670319822, now seen corresponding path program 6 times [2020-07-20 13:35:35,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:35:35,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983924834] [2020-07-20 13:35:35,131 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 [2020-07-20 13:35:38,606 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:35:38,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:35:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 16851 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 13:35:38,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:36:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49554 refuted. 0 times theorem prover too weak. 2725114 trivial. 0 not checked. [2020-07-20 13:36:05,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:36:06,394 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 13:36:06,689 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 13:36:08,980 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:36:09,777 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:36:09,908 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:36:10,072 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:36:10,234 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:36:11,782 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:36:11,921 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:36:12,068 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:36:12,214 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:36:15,258 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:36:15,412 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:36:15,572 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:36:15,733 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:36:22,770 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:36:22,940 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:36:23,118 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 13:36:23,295 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 13:36:34,934 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:36:35,117 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:36:35,348 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 13:36:35,586 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 13:36:35,843 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-20 13:36:36,095 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-20 13:36:36,287 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 13:36:36,511 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 13:36:36,729 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 13:36:36,885 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 13:36:37,033 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 13:36:37,172 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 13:36:37,302 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:36:37,429 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:36:37,543 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:36:37,652 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 13:38:31,030 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 13:38:31,136 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 13:38:31,249 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:38:31,361 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:38:31,915 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:38:32,035 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:38:32,165 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:38:32,297 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:38:33,114 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:38:33,242 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:38:33,376 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:38:33,505 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:38:34,892 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:38:35,022 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:38:35,174 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:38:35,325 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:38:38,234 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:38:38,385 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:38:38,548 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:38:38,724 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:38:44,439 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:38:44,577 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:38:44,725 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 13:38:44,867 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 13:38:45,015 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 13:38:45,151 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-20 13:38:45,278 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 13:38:45,406 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 13:38:45,520 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:38:45,631 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 13:38:45,736 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:38:46,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:38:46,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:25,496 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 13:39:25,602 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 13:39:26,350 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 13:39:26,463 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 13:39:26,583 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:39:26,703 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:39:27,239 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:39:27,367 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:39:27,506 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:39:27,639 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:39:28,441 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:39:28,586 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:39:28,738 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:39:28,888 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:39:30,355 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:39:30,473 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:39:30,599 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:39:30,726 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:39:32,560 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:39:32,699 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:39:32,841 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:39:32,980 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:39:33,116 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 13:39:33,242 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 13:39:33,364 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:39:33,483 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 13:39:33,596 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:39:33,701 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 13:39:34,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:39:51,195 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:39:52,301 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:39:52,407 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:39:52,512 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:39:52,621 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:39:53,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:02,012 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:40:02,228 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:40:03,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:03,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:08,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:12,432 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:40:13,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:17,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:19,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:20,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:21,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:21,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:21,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:21,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:22,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:22,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:22,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:40:22,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts