/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:49:18,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:49:18,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:49:18,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 00:49:18,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:49:18,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:49:18,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:49:18,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:49:18,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:49:18,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:49:18,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:49:18,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:49:18,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:49:18,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:49:18,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:49:18,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:49:18,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:49:18,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:49:18,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:49:18,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:49:18,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:49:18,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:49:18,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:49:18,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:49:18,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:49:18,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 00:49:18,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 00:49:18,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 00:49:18,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 00:49:18,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:49:18,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:49:18,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:49:18,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:49:18,936 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:49:18,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:49:18,936 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:49:18,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:49:18,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:49:18,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:49:18,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:49:18,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:49:18,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:49:18,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:49:18,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:49:18,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:49:18,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:49:18,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:49:18,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:49:18,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:49:18,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:49:18,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:49:18,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:49:18,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:49:18,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:49:18,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:49:18,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:18,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:49:18,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:49:18,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:49:19,220 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:49:19,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:49:19,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:49:19,239 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:49:19,240 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:49:19,241 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-21 00:49:19,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93190c6f0/86ea3f419bcb462c99554ae95d6afbc6/FLAG0f1084da8 [2020-07-21 00:49:19,779 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:49:19,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-21 00:49:19,789 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93190c6f0/86ea3f419bcb462c99554ae95d6afbc6/FLAG0f1084da8 [2020-07-21 00:49:20,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93190c6f0/86ea3f419bcb462c99554ae95d6afbc6 [2020-07-21 00:49:20,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:49:20,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:49:20,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:49:20,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:49:20,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:49:20,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:49:20" (1/1) ... [2020-07-21 00:49:20,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52731fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:20, skipping insertion in model container [2020-07-21 00:49:20,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:49:20" (1/1) ... [2020-07-21 00:49:20,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:49:20,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:49:20,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:49:20,416 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:49:20,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:49:20,445 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:49:20,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:20 WrapperNode [2020-07-21 00:49:20,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:49:20,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:49:20,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:49:20,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:49:20,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:20" (1/1) ... [2020-07-21 00:49:20,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:20" (1/1) ... [2020-07-21 00:49:20,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:20" (1/1) ... [2020-07-21 00:49:20,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:20" (1/1) ... [2020-07-21 00:49:20,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:20" (1/1) ... [2020-07-21 00:49:20,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:20" (1/1) ... [2020-07-21 00:49:20,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:20" (1/1) ... [2020-07-21 00:49:20,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:49:20,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:49:20,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:49:20,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:49:20,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:49:20,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:49:20,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:49:20,615 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 00:49:20,615 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 00:49:20,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:49:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:49:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:49:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 00:49:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 00:49:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:49:20,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:49:20,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:49:20,824 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:49:20,824 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:49:20,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:49:20 BoogieIcfgContainer [2020-07-21 00:49:20,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:49:20,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:49:20,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:49:20,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:49:20,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:49:20" (1/3) ... [2020-07-21 00:49:20,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c524086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:49:20, skipping insertion in model container [2020-07-21 00:49:20,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:49:20" (2/3) ... [2020-07-21 00:49:20,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c524086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:49:20, skipping insertion in model container [2020-07-21 00:49:20,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:49:20" (3/3) ... [2020-07-21 00:49:20,857 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-07-21 00:49:20,884 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:49:20,903 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:49:20,929 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:49:20,955 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:49:20,956 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:49:20,956 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:49:20,956 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:49:20,956 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:49:20,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:49:20,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:49:20,956 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:49:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 00:49:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:49:20,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:20,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:20,980 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 00:49:20,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:20,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350816040] [2020-07-21 00:49:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:21,055 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:21,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:21,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:49:21,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:49:21,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:49:21,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350816040] [2020-07-21 00:49:21,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:49:21,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:49:21,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577886039] [2020-07-21 00:49:21,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:49:21,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:21,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:49:21,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:49:21,170 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 00:49:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:21,285 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 00:49:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:49:21,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:49:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:21,297 INFO L225 Difference]: With dead ends: 44 [2020-07-21 00:49:21,298 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 00:49:21,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:49:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 00:49:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 00:49:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:49:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:49:21,345 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 00:49:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:21,346 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:49:21,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:49:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:49:21,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 00:49:21,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:21,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:21,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:21,562 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:21,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 00:49:21,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:21,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023351918] [2020-07-21 00:49:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:21,592 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:49:21,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:21,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:49:21,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:49:21,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:49:21,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023351918] [2020-07-21 00:49:21,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:49:21,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:49:21,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018583590] [2020-07-21 00:49:21,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:49:21,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:21,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:49:21,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:49:21,630 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 00:49:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:21,724 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 00:49:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:49:21,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 00:49:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:21,726 INFO L225 Difference]: With dead ends: 36 [2020-07-21 00:49:21,727 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 00:49:21,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:49:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 00:49:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 00:49:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:49:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:49:21,738 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 00:49:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:21,739 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:49:21,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:49:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:49:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 00:49:21,741 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:21,741 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:21,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:21,957 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:21,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:21,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 00:49:21,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:21,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197266656] [2020-07-21 00:49:21,961 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:22,010 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:22,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:22,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:49:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:49:22,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:22,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:22,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:49:22,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197266656] [2020-07-21 00:49:22,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:22,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:49:22,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900888058] [2020-07-21 00:49:22,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:49:22,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:22,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:49:22,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:49:22,389 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 00:49:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:22,506 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 00:49:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:49:22,507 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 00:49:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:22,510 INFO L225 Difference]: With dead ends: 41 [2020-07-21 00:49:22,510 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 00:49:22,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:49:22,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 00:49:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 00:49:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:49:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:49:22,521 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 00:49:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:22,521 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:49:22,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:49:22,522 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:49:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:49:22,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:22,524 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] [2020-07-21 00:49:22,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:22,738 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:22,739 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 00:49:22,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:22,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212129734] [2020-07-21 00:49:22,740 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 [2020-07-21 00:49:22,781 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:22,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:22,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:49:22,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:49:22,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:22,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:22,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:49:23,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212129734] [2020-07-21 00:49:23,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:23,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:49:23,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353296996] [2020-07-21 00:49:23,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:49:23,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:23,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:49:23,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:49:23,046 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 00:49:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:23,207 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 00:49:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:49:23,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 00:49:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:23,210 INFO L225 Difference]: With dead ends: 46 [2020-07-21 00:49:23,210 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 00:49:23,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:49:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 00:49:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 00:49:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:49:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:49:23,236 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 00:49:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:23,237 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:49:23,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:49:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:49:23,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 00:49:23,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:23,243 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:23,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:23,445 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:23,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:23,446 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 00:49:23,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:23,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986412142] [2020-07-21 00:49:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:23,477 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:23,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:23,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:49:23,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 00:49:23,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:23,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:23,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:23,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:49:23,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986412142] [2020-07-21 00:49:23,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:23,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 00:49:23,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563213545] [2020-07-21 00:49:23,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:49:23,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:23,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:49:23,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:49:23,963 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 00:49:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:24,157 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 00:49:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:49:24,158 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 00:49:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:24,160 INFO L225 Difference]: With dead ends: 51 [2020-07-21 00:49:24,161 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 00:49:24,162 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 [2020-07-21 00:49:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 00:49:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 00:49:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:49:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:49:24,181 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 00:49:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:24,182 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:49:24,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:49:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:49:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 00:49:24,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:24,185 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:24,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:24,399 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:24,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 00:49:24,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:24,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423605587] [2020-07-21 00:49:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:24,431 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:24,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:24,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:49:24,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:49:24,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:24,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:24,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:24,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:49:24,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423605587] [2020-07-21 00:49:24,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:24,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 00:49:24,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479504171] [2020-07-21 00:49:24,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:49:24,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:24,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:49:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:49:24,820 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 00:49:25,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:25,011 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 00:49:25,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:49:25,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 00:49:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:25,018 INFO L225 Difference]: With dead ends: 56 [2020-07-21 00:49:25,019 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 00:49:25,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:49:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 00:49:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 00:49:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:49:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:49:25,047 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 00:49:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:25,048 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:49:25,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:49:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:49:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 00:49:25,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:25,058 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:25,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:25,276 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 00:49:25,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:25,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504129015] [2020-07-21 00:49:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:25,313 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:25,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:25,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:49:25,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 00:49:25,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:25,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:25,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:25,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:25,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 00:49:25,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504129015] [2020-07-21 00:49:25,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:25,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 00:49:25,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031417489] [2020-07-21 00:49:25,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:49:25,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:25,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:49:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:49:25,992 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 00:49:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:26,199 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 00:49:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:49:26,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 00:49:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:26,202 INFO L225 Difference]: With dead ends: 61 [2020-07-21 00:49:26,202 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 00:49:26,203 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 [2020-07-21 00:49:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 00:49:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 00:49:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:49:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 00:49:26,215 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 00:49:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:26,215 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 00:49:26,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:49:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 00:49:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 00:49:26,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:26,218 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:26,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:26,432 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:26,434 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 00:49:26,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:26,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811786240] [2020-07-21 00:49:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:26,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:26,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:26,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:49:26,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 00:49:26,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:26,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:26,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:27,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:27,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:27,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 00:49:27,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811786240] [2020-07-21 00:49:27,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:27,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 00:49:27,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634142439] [2020-07-21 00:49:27,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:49:27,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:27,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:49:27,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:49:27,118 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 00:49:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:27,361 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 00:49:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:49:27,361 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 00:49:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:27,364 INFO L225 Difference]: With dead ends: 66 [2020-07-21 00:49:27,364 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 00:49:27,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:49:27,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 00:49:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 00:49:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:49:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 00:49:27,378 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 00:49:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:27,378 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 00:49:27,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:49:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 00:49:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 00:49:27,381 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:27,382 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:27,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:27,598 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:27,599 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 00:49:27,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:27,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752586496] [2020-07-21 00:49:27,601 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:27,650 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:27,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:27,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:49:27,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 00:49:27,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:28,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:28,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:28,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:28,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:28,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:28,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:28,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 00:49:28,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752586496] [2020-07-21 00:49:28,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:28,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 00:49:28,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993791203] [2020-07-21 00:49:28,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:49:28,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:28,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:49:28,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:49:28,729 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 00:49:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:29,002 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 00:49:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:49:29,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 00:49:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:29,006 INFO L225 Difference]: With dead ends: 71 [2020-07-21 00:49:29,006 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 00:49:29,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:49:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 00:49:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 00:49:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 00:49:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 00:49:29,019 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 00:49:29,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:29,020 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 00:49:29,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:49:29,020 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 00:49:29,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 00:49:29,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:29,022 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:29,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:29,237 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:29,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:29,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 00:49:29,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:29,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636690172] [2020-07-21 00:49:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:29,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:49:29,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:29,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:49:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 00:49:29,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:29,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:30,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:30,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:30,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 00:49:30,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636690172] [2020-07-21 00:49:30,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:30,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:49:30,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734038137] [2020-07-21 00:49:30,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:49:30,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:30,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:49:30,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:49:30,345 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 15 states. [2020-07-21 00:49:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:30,602 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 00:49:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:49:30,603 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 108 [2020-07-21 00:49:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:30,605 INFO L225 Difference]: With dead ends: 76 [2020-07-21 00:49:30,605 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 00:49:30,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:49:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 00:49:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 00:49:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 00:49:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 00:49:30,637 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 00:49:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:30,638 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 00:49:30,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:49:30,639 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 00:49:30,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 00:49:30,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:30,646 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:30,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:30,848 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:30,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:30,849 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 00:49:30,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:30,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540758420] [2020-07-21 00:49:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:30,918 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:49:30,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:30,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:49:30,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 00:49:31,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:32,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:32,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:32,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:32,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:32,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:32,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:32,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:32,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 00:49:32,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540758420] [2020-07-21 00:49:32,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:32,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:49:32,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675940395] [2020-07-21 00:49:32,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:49:32,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:32,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:49:32,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:49:32,788 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 17 states. [2020-07-21 00:49:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:33,093 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 00:49:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:49:33,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 208 [2020-07-21 00:49:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:33,096 INFO L225 Difference]: With dead ends: 81 [2020-07-21 00:49:33,096 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 00:49:33,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:49:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 00:49:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 00:49:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 00:49:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 00:49:33,109 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 00:49:33,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:33,110 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 00:49:33,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:49:33,110 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 00:49:33,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-21 00:49:33,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:33,112 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:33,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:33,326 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:33,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:33,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1298373331, now seen corresponding path program 2 times [2020-07-21 00:49:33,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:33,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423547992] [2020-07-21 00:49:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:33,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:33,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:33,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:49:33,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 156 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 00:49:33,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:34,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:34,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:34,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:34,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:34,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:34,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:34,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:34,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 164 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-07-21 00:49:34,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423547992] [2020-07-21 00:49:34,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:34,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:49:34,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124737175] [2020-07-21 00:49:34,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:49:34,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:49:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:49:34,625 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 15 states. [2020-07-21 00:49:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:34,921 INFO L93 Difference]: Finished difference Result 99 states and 221 transitions. [2020-07-21 00:49:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:49:34,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-07-21 00:49:34,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:34,929 INFO L225 Difference]: With dead ends: 99 [2020-07-21 00:49:34,929 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 00:49:34,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 272 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:49:34,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 00:49:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 57. [2020-07-21 00:49:34,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 00:49:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 92 transitions. [2020-07-21 00:49:34,960 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 92 transitions. Word has length 148 [2020-07-21 00:49:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:34,962 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 92 transitions. [2020-07-21 00:49:34,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:49:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 92 transitions. [2020-07-21 00:49:34,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-21 00:49:34,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:34,966 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:35,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:35,173 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:35,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:35,174 INFO L82 PathProgramCache]: Analyzing trace with hash 2095197631, now seen corresponding path program 1 times [2020-07-21 00:49:35,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:35,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942516969] [2020-07-21 00:49:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:35,262 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:35,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:49:35,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-07-21 00:49:35,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:35,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:35,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:35,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:36,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 94 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-07-21 00:49:36,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942516969] [2020-07-21 00:49:36,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:36,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:49:36,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457676437] [2020-07-21 00:49:36,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:49:36,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:36,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:49:36,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:49:36,097 INFO L87 Difference]: Start difference. First operand 57 states and 92 transitions. Second operand 13 states. [2020-07-21 00:49:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:36,338 INFO L93 Difference]: Finished difference Result 99 states and 217 transitions. [2020-07-21 00:49:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:49:36,344 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2020-07-21 00:49:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:36,346 INFO L225 Difference]: With dead ends: 99 [2020-07-21 00:49:36,347 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 00:49:36,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 226 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:49:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 00:49:36,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2020-07-21 00:49:36,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 00:49:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 98 transitions. [2020-07-21 00:49:36,361 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 98 transitions. Word has length 123 [2020-07-21 00:49:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:36,361 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 98 transitions. [2020-07-21 00:49:36,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:49:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 98 transitions. [2020-07-21 00:49:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-21 00:49:36,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:36,365 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 11, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:36,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:36,581 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:36,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1017418174, now seen corresponding path program 1 times [2020-07-21 00:49:36,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:36,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579147401] [2020-07-21 00:49:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:36,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:36,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:36,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:49:36,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 114 proven. 292 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-07-21 00:49:36,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:38,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:38,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:38,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:38,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:38,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:38,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:38,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:38,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:38,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 116 proven. 304 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2020-07-21 00:49:38,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579147401] [2020-07-21 00:49:38,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:38,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:49:38,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310272866] [2020-07-21 00:49:38,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:49:38,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:49:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:49:38,655 INFO L87 Difference]: Start difference. First operand 59 states and 98 transitions. Second operand 17 states. [2020-07-21 00:49:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:39,039 INFO L93 Difference]: Finished difference Result 113 states and 271 transitions. [2020-07-21 00:49:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:49:39,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 216 [2020-07-21 00:49:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:39,042 INFO L225 Difference]: With dead ends: 113 [2020-07-21 00:49:39,042 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 00:49:39,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 403 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:49:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 00:49:39,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-21 00:49:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 00:49:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 104 transitions. [2020-07-21 00:49:39,055 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 104 transitions. Word has length 216 [2020-07-21 00:49:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:39,056 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 104 transitions. [2020-07-21 00:49:39,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:49:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 104 transitions. [2020-07-21 00:49:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 00:49:39,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:39,060 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:39,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:39,274 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:39,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1521837768, now seen corresponding path program 2 times [2020-07-21 00:49:39,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:39,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502528819] [2020-07-21 00:49:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:39,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:49:39,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:39,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:49:39,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 114 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2020-07-21 00:49:39,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:40,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:40,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:40,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:40,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:40,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:40,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:40,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:40,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 122 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-07-21 00:49:40,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502528819] [2020-07-21 00:49:40,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:40,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:49:40,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405571767] [2020-07-21 00:49:40,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:49:40,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:40,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:49:40,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:49:40,491 INFO L87 Difference]: Start difference. First operand 67 states and 104 transitions. Second operand 15 states. [2020-07-21 00:49:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:40,767 INFO L93 Difference]: Finished difference Result 107 states and 201 transitions. [2020-07-21 00:49:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:49:40,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-21 00:49:40,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:40,773 INFO L225 Difference]: With dead ends: 107 [2020-07-21 00:49:40,773 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 00:49:40,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:49:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 00:49:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 70. [2020-07-21 00:49:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 00:49:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 112 transitions. [2020-07-21 00:49:40,791 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 112 transitions. Word has length 135 [2020-07-21 00:49:40,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:40,792 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 112 transitions. [2020-07-21 00:49:40,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:49:40,792 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 112 transitions. [2020-07-21 00:49:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-21 00:49:40,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:40,795 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:41,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:41,010 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:41,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1102424554, now seen corresponding path program 3 times [2020-07-21 00:49:41,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:41,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960660586] [2020-07-21 00:49:41,012 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:41,198 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:49:41,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:49:41,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 116 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2020-07-21 00:49:41,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:42,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:42,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:42,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:42,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:42,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:42,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:42,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:42,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:42,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:42,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 130 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 00:49:43,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960660586] [2020-07-21 00:49:43,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:43,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:49:43,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643005479] [2020-07-21 00:49:43,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:49:43,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:43,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:49:43,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:49:43,022 INFO L87 Difference]: Start difference. First operand 70 states and 112 transitions. Second operand 17 states. [2020-07-21 00:49:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:43,406 INFO L93 Difference]: Finished difference Result 107 states and 197 transitions. [2020-07-21 00:49:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:49:43,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 163 [2020-07-21 00:49:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:43,409 INFO L225 Difference]: With dead ends: 107 [2020-07-21 00:49:43,409 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 00:49:43,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 297 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:49:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 00:49:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-21 00:49:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 00:49:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions. [2020-07-21 00:49:43,421 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 163 [2020-07-21 00:49:43,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:43,421 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 115 transitions. [2020-07-21 00:49:43,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:49:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions. [2020-07-21 00:49:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-21 00:49:43,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:43,423 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:43,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:43,638 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:43,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 4 times [2020-07-21 00:49:43,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:43,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736059740] [2020-07-21 00:49:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:43,764 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:49:43,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:43,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:49:43,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 76 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-07-21 00:49:43,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:44,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:44,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:44,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:44,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:44,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 81 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2020-07-21 00:49:44,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736059740] [2020-07-21 00:49:44,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:44,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:49:44,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267889916] [2020-07-21 00:49:44,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:49:44,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:44,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:49:44,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:49:44,612 INFO L87 Difference]: Start difference. First operand 75 states and 115 transitions. Second operand 13 states. [2020-07-21 00:49:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:44,831 INFO L93 Difference]: Finished difference Result 107 states and 179 transitions. [2020-07-21 00:49:44,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:49:44,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-07-21 00:49:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:44,834 INFO L225 Difference]: With dead ends: 107 [2020-07-21 00:49:44,834 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 00:49:44,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:49:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 00:49:44,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-07-21 00:49:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 00:49:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 136 transitions. [2020-07-21 00:49:44,848 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 136 transitions. Word has length 136 [2020-07-21 00:49:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:44,849 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 136 transitions. [2020-07-21 00:49:44,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:49:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 136 transitions. [2020-07-21 00:49:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-21 00:49:44,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:44,852 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:45,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:45,062 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:45,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:45,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1316077641, now seen corresponding path program 5 times [2020-07-21 00:49:45,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:45,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713879049] [2020-07-21 00:49:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:45,188 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:49:45,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:45,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:49:45,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 106 proven. 98 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-07-21 00:49:45,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:45,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:46,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:46,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:46,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:46,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:46,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 108 proven. 104 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-07-21 00:49:46,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713879049] [2020-07-21 00:49:46,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:46,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:49:46,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114193759] [2020-07-21 00:49:46,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:49:46,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:46,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:49:46,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:49:46,414 INFO L87 Difference]: Start difference. First operand 82 states and 136 transitions. Second operand 15 states. [2020-07-21 00:49:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:46,658 INFO L93 Difference]: Finished difference Result 117 states and 203 transitions. [2020-07-21 00:49:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:49:46,659 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-07-21 00:49:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:46,661 INFO L225 Difference]: With dead ends: 117 [2020-07-21 00:49:46,662 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 00:49:46,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 271 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:49:46,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 00:49:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-07-21 00:49:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 00:49:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions. [2020-07-21 00:49:46,673 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 148 [2020-07-21 00:49:46,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:46,674 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 128 transitions. [2020-07-21 00:49:46,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:49:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions. [2020-07-21 00:49:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-21 00:49:46,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:46,676 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:46,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:46,891 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:46,892 INFO L82 PathProgramCache]: Analyzing trace with hash -872965087, now seen corresponding path program 6 times [2020-07-21 00:49:46,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:46,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37857350] [2020-07-21 00:49:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:47,028 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:49:47,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:47,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:49:47,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 81 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 00:49:47,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:47,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:47,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:47,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:47,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:47,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:47,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:47,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 85 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 00:49:47,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37857350] [2020-07-21 00:49:47,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:47,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:49:47,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650439263] [2020-07-21 00:49:47,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:49:47,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:47,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:49:47,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:49:47,902 INFO L87 Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states. [2020-07-21 00:49:48,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:48,138 INFO L93 Difference]: Finished difference Result 114 states and 190 transitions. [2020-07-21 00:49:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:49:48,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 149 [2020-07-21 00:49:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:48,159 INFO L225 Difference]: With dead ends: 114 [2020-07-21 00:49:48,159 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 00:49:48,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 277 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:49:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 00:49:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-07-21 00:49:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 00:49:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions. [2020-07-21 00:49:48,171 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 149 [2020-07-21 00:49:48,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:48,175 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 128 transitions. [2020-07-21 00:49:48,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:49:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions. [2020-07-21 00:49:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-21 00:49:48,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:48,178 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:48,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:48,393 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:48,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:48,393 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 7 times [2020-07-21 00:49:48,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:48,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885173924] [2020-07-21 00:49:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:48,550 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:49:48,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:48,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:49:48,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-07-21 00:49:48,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:49,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:49,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:49,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:49,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:49,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 143 proven. 37 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 00:49:49,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885173924] [2020-07-21 00:49:49,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:49,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:49:49,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291087448] [2020-07-21 00:49:49,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:49:49,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:49,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:49:49,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:49:49,359 INFO L87 Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states. [2020-07-21 00:49:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:49,568 INFO L93 Difference]: Finished difference Result 106 states and 183 transitions. [2020-07-21 00:49:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:49:49,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 150 [2020-07-21 00:49:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:49,571 INFO L225 Difference]: With dead ends: 106 [2020-07-21 00:49:49,572 INFO L226 Difference]: Without dead ends: 99 [2020-07-21 00:49:49,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:49:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-21 00:49:49,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-07-21 00:49:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-21 00:49:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 161 transitions. [2020-07-21 00:49:49,584 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 161 transitions. Word has length 150 [2020-07-21 00:49:49,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:49,584 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 161 transitions. [2020-07-21 00:49:49,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:49:49,584 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 161 transitions. [2020-07-21 00:49:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-07-21 00:49:49,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:49,587 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 9, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:49,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:49,802 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1102006884, now seen corresponding path program 8 times [2020-07-21 00:49:49,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:49,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904191366] [2020-07-21 00:49:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:49,964 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:49:49,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:49,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:49:49,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 185 proven. 49 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-07-21 00:49:50,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:50,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:50,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:51,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 187 proven. 55 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2020-07-21 00:49:51,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904191366] [2020-07-21 00:49:51,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:51,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:49:51,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199851222] [2020-07-21 00:49:51,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:49:51,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:51,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:49:51,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:49:51,198 INFO L87 Difference]: Start difference. First operand 92 states and 161 transitions. Second operand 15 states. [2020-07-21 00:49:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:51,425 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-07-21 00:49:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:49:51,430 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 162 [2020-07-21 00:49:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:51,432 INFO L225 Difference]: With dead ends: 117 [2020-07-21 00:49:51,432 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 00:49:51,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 299 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:49:51,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 00:49:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-07-21 00:49:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 00:49:51,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 158 transitions. [2020-07-21 00:49:51,444 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 158 transitions. Word has length 162 [2020-07-21 00:49:51,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:51,445 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 158 transitions. [2020-07-21 00:49:51,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:49:51,445 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 158 transitions. [2020-07-21 00:49:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-21 00:49:51,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:51,448 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:51,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:51,664 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1920867700, now seen corresponding path program 9 times [2020-07-21 00:49:51,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:51,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129702041] [2020-07-21 00:49:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:51,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:49:51,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:51,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:49:51,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 37 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2020-07-21 00:49:51,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:52,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:52,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:52,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:52,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:52,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:52,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:52,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 43 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-21 00:49:52,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129702041] [2020-07-21 00:49:52,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:52,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:49:52,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077246862] [2020-07-21 00:49:52,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:49:52,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:52,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:49:52,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:49:52,754 INFO L87 Difference]: Start difference. First operand 96 states and 158 transitions. Second operand 13 states. [2020-07-21 00:49:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:52,992 INFO L93 Difference]: Finished difference Result 129 states and 217 transitions. [2020-07-21 00:49:52,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:49:52,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 163 [2020-07-21 00:49:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:52,995 INFO L225 Difference]: With dead ends: 129 [2020-07-21 00:49:52,995 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 00:49:52,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 305 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:49:52,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 00:49:53,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2020-07-21 00:49:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 00:49:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions. [2020-07-21 00:49:53,009 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 163 [2020-07-21 00:49:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:53,009 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 149 transitions. [2020-07-21 00:49:53,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:49:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions. [2020-07-21 00:49:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-07-21 00:49:53,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:53,013 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:53,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:53,227 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:53,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:53,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1607241826, now seen corresponding path program 10 times [2020-07-21 00:49:53,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:53,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603168682] [2020-07-21 00:49:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:53,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:49:53,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:53,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:49:53,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 32 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-07-21 00:49:53,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:53,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:53,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:53,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:53,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 34 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-07-21 00:49:54,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603168682] [2020-07-21 00:49:54,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:54,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 00:49:54,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818405570] [2020-07-21 00:49:54,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:49:54,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:54,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:49:54,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:49:54,069 INFO L87 Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 11 states. [2020-07-21 00:49:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:54,216 INFO L93 Difference]: Finished difference Result 131 states and 225 transitions. [2020-07-21 00:49:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:49:54,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 164 [2020-07-21 00:49:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:54,219 INFO L225 Difference]: With dead ends: 131 [2020-07-21 00:49:54,219 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 00:49:54,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 311 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:49:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 00:49:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-07-21 00:49:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 00:49:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 157 transitions. [2020-07-21 00:49:54,230 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 157 transitions. Word has length 164 [2020-07-21 00:49:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:54,230 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 157 transitions. [2020-07-21 00:49:54,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:49:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 157 transitions. [2020-07-21 00:49:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-21 00:49:54,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:54,233 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:54,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:54,449 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:54,450 INFO L82 PathProgramCache]: Analyzing trace with hash -315995755, now seen corresponding path program 11 times [2020-07-21 00:49:54,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:54,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044340208] [2020-07-21 00:49:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:54,619 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:49:54,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:54,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:49:54,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 168 proven. 41 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2020-07-21 00:49:54,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:55,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:55,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:55,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:55,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:55,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 170 proven. 43 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-21 00:49:55,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044340208] [2020-07-21 00:49:55,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:55,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:49:55,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817813650] [2020-07-21 00:49:55,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:49:55,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:55,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:49:55,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:49:55,539 INFO L87 Difference]: Start difference. First operand 95 states and 157 transitions. Second operand 13 states. [2020-07-21 00:49:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:55,730 INFO L93 Difference]: Finished difference Result 110 states and 175 transitions. [2020-07-21 00:49:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:49:55,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 176 [2020-07-21 00:49:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:55,733 INFO L225 Difference]: With dead ends: 110 [2020-07-21 00:49:55,733 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 00:49:55,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 331 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:49:55,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 00:49:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-07-21 00:49:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 00:49:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions. [2020-07-21 00:49:55,744 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 176 [2020-07-21 00:49:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:55,745 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 149 transitions. [2020-07-21 00:49:55,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:49:55,745 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions. [2020-07-21 00:49:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-21 00:49:55,748 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:55,748 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:55,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:55,963 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:55,963 INFO L82 PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 12 times [2020-07-21 00:49:55,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:55,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591847512] [2020-07-21 00:49:55,964 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:56,164 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:49:56,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:49:56,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 47 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2020-07-21 00:49:56,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:56,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:57,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:57,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:57,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:57,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:57,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 55 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-07-21 00:49:57,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591847512] [2020-07-21 00:49:57,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:49:57,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:49:57,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020100377] [2020-07-21 00:49:57,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:49:57,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:49:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:49:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:49:57,512 INFO L87 Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 15 states. [2020-07-21 00:49:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:49:57,789 INFO L93 Difference]: Finished difference Result 123 states and 202 transitions. [2020-07-21 00:49:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:49:57,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 191 [2020-07-21 00:49:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:49:57,793 INFO L225 Difference]: With dead ends: 123 [2020-07-21 00:49:57,794 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 00:49:57,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 357 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:49:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 00:49:57,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-07-21 00:49:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 00:49:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 173 transitions. [2020-07-21 00:49:57,805 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 173 transitions. Word has length 191 [2020-07-21 00:49:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:49:57,806 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 173 transitions. [2020-07-21 00:49:57,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:49:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 173 transitions. [2020-07-21 00:49:57,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-21 00:49:57,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:49:57,809 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:49:58,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:58,024 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:49:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:49:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash -31808317, now seen corresponding path program 13 times [2020-07-21 00:49:58,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:49:58,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303609169] [2020-07-21 00:49:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:49:58,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:49:58,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:49:58,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:49:58,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:49:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 102 refuted. 0 times theorem prover too weak. 701 trivial. 0 not checked. [2020-07-21 00:49:58,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:49:59,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:49:59,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 116 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2020-07-21 00:50:00,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303609169] [2020-07-21 00:50:00,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:00,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:50:00,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881672811] [2020-07-21 00:50:00,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:50:00,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:00,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:50:00,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:00,112 INFO L87 Difference]: Start difference. First operand 101 states and 173 transitions. Second operand 17 states. [2020-07-21 00:50:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:00,449 INFO L93 Difference]: Finished difference Result 121 states and 205 transitions. [2020-07-21 00:50:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:50:00,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 204 [2020-07-21 00:50:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:00,453 INFO L225 Difference]: With dead ends: 121 [2020-07-21 00:50:00,454 INFO L226 Difference]: Without dead ends: 114 [2020-07-21 00:50:00,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 379 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:50:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-21 00:50:00,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2020-07-21 00:50:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 00:50:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 161 transitions. [2020-07-21 00:50:00,465 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 161 transitions. Word has length 204 [2020-07-21 00:50:00,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:00,466 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 161 transitions. [2020-07-21 00:50:00,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:50:00,466 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 161 transitions. [2020-07-21 00:50:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-21 00:50:00,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:00,469 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:00,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:00,682 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 14 times [2020-07-21 00:50:00,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:00,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090165627] [2020-07-21 00:50:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:00,876 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:50:00,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:00,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-21 00:50:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-21 00:50:01,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-21 00:50:03,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090165627] [2020-07-21 00:50:03,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:03,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 00:50:03,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291056294] [2020-07-21 00:50:03,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 00:50:03,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:03,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 00:50:03,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 00:50:03,482 INFO L87 Difference]: Start difference. First operand 93 states and 161 transitions. Second operand 36 states. [2020-07-21 00:50:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:04,434 INFO L93 Difference]: Finished difference Result 226 states and 521 transitions. [2020-07-21 00:50:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 00:50:04,435 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-07-21 00:50:04,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:04,446 INFO L225 Difference]: With dead ends: 226 [2020-07-21 00:50:04,446 INFO L226 Difference]: Without dead ends: 219 [2020-07-21 00:50:04,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 00:50:04,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-21 00:50:04,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 145. [2020-07-21 00:50:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-21 00:50:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 323 transitions. [2020-07-21 00:50:04,480 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 323 transitions. Word has length 177 [2020-07-21 00:50:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:04,481 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 323 transitions. [2020-07-21 00:50:04,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 00:50:04,481 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 323 transitions. [2020-07-21 00:50:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-21 00:50:04,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:04,488 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:04,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:04,689 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:04,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1104223868, now seen corresponding path program 15 times [2020-07-21 00:50:04,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:04,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210911217] [2020-07-21 00:50:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:04,871 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:04,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:04,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 00:50:04,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 104 proven. 204 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-07-21 00:50:05,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:06,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 104 proven. 212 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2020-07-21 00:50:06,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210911217] [2020-07-21 00:50:06,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:06,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 00:50:06,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011034405] [2020-07-21 00:50:06,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:50:06,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:06,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:50:06,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:06,647 INFO L87 Difference]: Start difference. First operand 145 states and 323 transitions. Second operand 17 states. [2020-07-21 00:50:07,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:07,007 INFO L93 Difference]: Finished difference Result 199 states and 481 transitions. [2020-07-21 00:50:07,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:50:07,008 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 191 [2020-07-21 00:50:07,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:07,011 INFO L225 Difference]: With dead ends: 199 [2020-07-21 00:50:07,011 INFO L226 Difference]: Without dead ends: 145 [2020-07-21 00:50:07,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 355 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:50:07,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-21 00:50:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-07-21 00:50:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-21 00:50:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 299 transitions. [2020-07-21 00:50:07,034 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 299 transitions. Word has length 191 [2020-07-21 00:50:07,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:07,035 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 299 transitions. [2020-07-21 00:50:07,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:50:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 299 transitions. [2020-07-21 00:50:07,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-21 00:50:07,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:07,041 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:07,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:07,256 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:07,256 INFO L82 PathProgramCache]: Analyzing trace with hash -916523095, now seen corresponding path program 16 times [2020-07-21 00:50:07,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:07,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373326478] [2020-07-21 00:50:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:07,449 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:50:07,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:07,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:50:07,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 131 proven. 137 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-07-21 00:50:07,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:08,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:08,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:08,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:08,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:08,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:08,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:08,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:08,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 131 proven. 147 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-07-21 00:50:08,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373326478] [2020-07-21 00:50:08,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:08,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:50:08,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714545715] [2020-07-21 00:50:08,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:50:08,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:50:08,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:50:08,746 INFO L87 Difference]: Start difference. First operand 145 states and 299 transitions. Second operand 15 states. [2020-07-21 00:50:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:09,052 INFO L93 Difference]: Finished difference Result 200 states and 443 transitions. [2020-07-21 00:50:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:50:09,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 178 [2020-07-21 00:50:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:09,057 INFO L225 Difference]: With dead ends: 200 [2020-07-21 00:50:09,057 INFO L226 Difference]: Without dead ends: 168 [2020-07-21 00:50:09,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 331 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:50:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-21 00:50:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 148. [2020-07-21 00:50:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-21 00:50:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 302 transitions. [2020-07-21 00:50:09,080 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 302 transitions. Word has length 178 [2020-07-21 00:50:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:09,081 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 302 transitions. [2020-07-21 00:50:09,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:50:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 302 transitions. [2020-07-21 00:50:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 00:50:09,085 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:09,085 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:09,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:09,300 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:09,300 INFO L82 PathProgramCache]: Analyzing trace with hash -140375518, now seen corresponding path program 17 times [2020-07-21 00:50:09,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:09,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366198813] [2020-07-21 00:50:09,301 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:09,515 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:50:09,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:09,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:50:09,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 211 proven. 43 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2020-07-21 00:50:09,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:10,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:10,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:10,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:10,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:10,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 00:50:10,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366198813] [2020-07-21 00:50:10,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:10,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 00:50:10,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523796045] [2020-07-21 00:50:10,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:50:10,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:10,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:50:10,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:50:10,710 INFO L87 Difference]: Start difference. First operand 148 states and 302 transitions. Second operand 15 states. [2020-07-21 00:50:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:10,972 INFO L93 Difference]: Finished difference Result 167 states and 322 transitions. [2020-07-21 00:50:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:50:10,973 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-21 00:50:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:10,978 INFO L225 Difference]: With dead ends: 167 [2020-07-21 00:50:10,978 INFO L226 Difference]: Without dead ends: 160 [2020-07-21 00:50:10,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:50:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-21 00:50:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 145. [2020-07-21 00:50:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-21 00:50:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 289 transitions. [2020-07-21 00:50:11,006 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 289 transitions. Word has length 189 [2020-07-21 00:50:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:11,007 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 289 transitions. [2020-07-21 00:50:11,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:50:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 289 transitions. [2020-07-21 00:50:11,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-21 00:50:11,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:11,016 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:11,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:11,231 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:11,231 INFO L82 PathProgramCache]: Analyzing trace with hash -712647889, now seen corresponding path program 18 times [2020-07-21 00:50:11,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:11,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004257680] [2020-07-21 00:50:11,232 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:11,428 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:50:11,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:11,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:50:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 210 proven. 60 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-21 00:50:11,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:12,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:12,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:12,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:12,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:12,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:12,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:12,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:12,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:12,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:12,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 212 proven. 66 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-07-21 00:50:12,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004257680] [2020-07-21 00:50:12,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:12,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 00:50:12,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347873882] [2020-07-21 00:50:12,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:50:12,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:12,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:50:12,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:50:12,757 INFO L87 Difference]: Start difference. First operand 145 states and 289 transitions. Second operand 15 states. [2020-07-21 00:50:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:12,998 INFO L93 Difference]: Finished difference Result 173 states and 340 transitions. [2020-07-21 00:50:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:50:12,998 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 178 [2020-07-21 00:50:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:13,000 INFO L225 Difference]: With dead ends: 173 [2020-07-21 00:50:13,001 INFO L226 Difference]: Without dead ends: 166 [2020-07-21 00:50:13,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 331 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:50:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-21 00:50:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2020-07-21 00:50:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 00:50:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 277 transitions. [2020-07-21 00:50:13,022 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 277 transitions. Word has length 178 [2020-07-21 00:50:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:13,023 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 277 transitions. [2020-07-21 00:50:13,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:50:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 277 transitions. [2020-07-21 00:50:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 00:50:13,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:13,027 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:13,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:13,241 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1156996270, now seen corresponding path program 19 times [2020-07-21 00:50:13,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:13,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629506388] [2020-07-21 00:50:13,243 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:13,530 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:50:13,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:13,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 00:50:13,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 234 proven. 69 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-21 00:50:13,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:14,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:14,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 232 proven. 79 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2020-07-21 00:50:15,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629506388] [2020-07-21 00:50:15,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:15,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 00:50:15,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262863714] [2020-07-21 00:50:15,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:50:15,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:15,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:50:15,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:15,129 INFO L87 Difference]: Start difference. First operand 137 states and 277 transitions. Second operand 17 states. [2020-07-21 00:50:15,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:15,434 INFO L93 Difference]: Finished difference Result 171 states and 365 transitions. [2020-07-21 00:50:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:50:15,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 189 [2020-07-21 00:50:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:15,437 INFO L225 Difference]: With dead ends: 171 [2020-07-21 00:50:15,437 INFO L226 Difference]: Without dead ends: 164 [2020-07-21 00:50:15,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 351 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:50:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-21 00:50:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 140. [2020-07-21 00:50:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 00:50:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 290 transitions. [2020-07-21 00:50:15,456 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 290 transitions. Word has length 189 [2020-07-21 00:50:15,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:15,457 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 290 transitions. [2020-07-21 00:50:15,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:50:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 290 transitions. [2020-07-21 00:50:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 00:50:15,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:15,461 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:15,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:15,676 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1915119264, now seen corresponding path program 20 times [2020-07-21 00:50:15,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:15,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006367262] [2020-07-21 00:50:15,677 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:15,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:15,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:15,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 00:50:15,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 151 proven. 152 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-21 00:50:16,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:16,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:16,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:17,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:17,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:17,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:17,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:17,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 149 proven. 162 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2020-07-21 00:50:17,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006367262] [2020-07-21 00:50:17,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:17,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 00:50:17,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580207161] [2020-07-21 00:50:17,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:50:17,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:17,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:50:17,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:17,451 INFO L87 Difference]: Start difference. First operand 140 states and 290 transitions. Second operand 17 states. [2020-07-21 00:50:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:17,810 INFO L93 Difference]: Finished difference Result 175 states and 370 transitions. [2020-07-21 00:50:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:50:17,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 189 [2020-07-21 00:50:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:17,813 INFO L225 Difference]: With dead ends: 175 [2020-07-21 00:50:17,814 INFO L226 Difference]: Without dead ends: 143 [2020-07-21 00:50:17,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 351 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:50:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-21 00:50:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 127. [2020-07-21 00:50:17,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-21 00:50:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 245 transitions. [2020-07-21 00:50:17,832 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 245 transitions. Word has length 189 [2020-07-21 00:50:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:17,832 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 245 transitions. [2020-07-21 00:50:17,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:50:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 245 transitions. [2020-07-21 00:50:17,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 00:50:17,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:17,836 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:18,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:18,051 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:18,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1838391522, now seen corresponding path program 21 times [2020-07-21 00:50:18,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:18,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334158097] [2020-07-21 00:50:18,052 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:18,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:50:18,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:18,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:50:18,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 198 proven. 54 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-07-21 00:50:18,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:18,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:18,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:18,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:19,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:19,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:19,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:19,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 197 proven. 61 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 00:50:19,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334158097] [2020-07-21 00:50:19,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:19,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 00:50:19,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481127027] [2020-07-21 00:50:19,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:50:19,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:50:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:50:19,323 INFO L87 Difference]: Start difference. First operand 127 states and 245 transitions. Second operand 15 states. [2020-07-21 00:50:19,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:19,623 INFO L93 Difference]: Finished difference Result 165 states and 351 transitions. [2020-07-21 00:50:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:50:19,624 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-21 00:50:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:19,628 INFO L225 Difference]: With dead ends: 165 [2020-07-21 00:50:19,628 INFO L226 Difference]: Without dead ends: 158 [2020-07-21 00:50:19,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:50:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-21 00:50:19,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 120. [2020-07-21 00:50:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-21 00:50:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 232 transitions. [2020-07-21 00:50:19,646 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 232 transitions. Word has length 189 [2020-07-21 00:50:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:19,646 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 232 transitions. [2020-07-21 00:50:19,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:50:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 232 transitions. [2020-07-21 00:50:19,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 00:50:19,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:19,649 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:19,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:19,864 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:19,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1674908912, now seen corresponding path program 22 times [2020-07-21 00:50:19,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:19,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663272168] [2020-07-21 00:50:19,865 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:20,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:50:20,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:20,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:50:20,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 124 proven. 130 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2020-07-21 00:50:20,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:20,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:21,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:21,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:21,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:21,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:21,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 125 proven. 133 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 00:50:21,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663272168] [2020-07-21 00:50:21,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:21,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 00:50:21,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377020338] [2020-07-21 00:50:21,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:50:21,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:21,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:50:21,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:50:21,261 INFO L87 Difference]: Start difference. First operand 120 states and 232 transitions. Second operand 15 states. [2020-07-21 00:50:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:21,522 INFO L93 Difference]: Finished difference Result 161 states and 323 transitions. [2020-07-21 00:50:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:50:21,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-21 00:50:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:21,524 INFO L225 Difference]: With dead ends: 161 [2020-07-21 00:50:21,525 INFO L226 Difference]: Without dead ends: 129 [2020-07-21 00:50:21,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:50:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-21 00:50:21,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2020-07-21 00:50:21,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 00:50:21,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 192 transitions. [2020-07-21 00:50:21,537 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 192 transitions. Word has length 189 [2020-07-21 00:50:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:21,538 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 192 transitions. [2020-07-21 00:50:21,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:50:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 192 transitions. [2020-07-21 00:50:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-21 00:50:21,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:21,540 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:21,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:21,754 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:21,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:21,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2096855727, now seen corresponding path program 23 times [2020-07-21 00:50:21,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:21,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415208946] [2020-07-21 00:50:21,755 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:21,969 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:21,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:21,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:50:21,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 69 proven. 241 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-07-21 00:50:22,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:23,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:23,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:23,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:23,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:23,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:23,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:23,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:23,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:23,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 73 proven. 251 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2020-07-21 00:50:23,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415208946] [2020-07-21 00:50:23,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:23,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 00:50:23,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52290167] [2020-07-21 00:50:23,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:50:23,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:23,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:50:23,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:23,817 INFO L87 Difference]: Start difference. First operand 107 states and 192 transitions. Second operand 17 states. [2020-07-21 00:50:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:24,179 INFO L93 Difference]: Finished difference Result 168 states and 323 transitions. [2020-07-21 00:50:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:50:24,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 178 [2020-07-21 00:50:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:24,183 INFO L225 Difference]: With dead ends: 168 [2020-07-21 00:50:24,183 INFO L226 Difference]: Without dead ends: 104 [2020-07-21 00:50:24,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 327 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:50:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-21 00:50:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-07-21 00:50:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-21 00:50:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 148 transitions. [2020-07-21 00:50:24,195 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 148 transitions. Word has length 178 [2020-07-21 00:50:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:24,195 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 148 transitions. [2020-07-21 00:50:24,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:50:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 148 transitions. [2020-07-21 00:50:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 00:50:24,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:24,198 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:24,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:24,412 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1148569106, now seen corresponding path program 24 times [2020-07-21 00:50:24,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:24,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076277588] [2020-07-21 00:50:24,413 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:24,630 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:24,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:24,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 00:50:24,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 91 proven. 212 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-21 00:50:24,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:25,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 91 proven. 220 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2020-07-21 00:50:26,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076277588] [2020-07-21 00:50:26,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:26,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 00:50:26,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190628349] [2020-07-21 00:50:26,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:50:26,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:50:26,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:26,388 INFO L87 Difference]: Start difference. First operand 104 states and 148 transitions. Second operand 17 states. [2020-07-21 00:50:26,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:26,720 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2020-07-21 00:50:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:50:26,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 189 [2020-07-21 00:50:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:26,724 INFO L225 Difference]: With dead ends: 152 [2020-07-21 00:50:26,725 INFO L226 Difference]: Without dead ends: 104 [2020-07-21 00:50:26,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 351 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:50:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-21 00:50:26,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-07-21 00:50:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-21 00:50:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-07-21 00:50:26,735 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 189 [2020-07-21 00:50:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:26,735 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-07-21 00:50:26,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:50:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-07-21 00:50:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 00:50:26,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:26,738 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:26,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:26,952 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:26,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1803358882, now seen corresponding path program 25 times [2020-07-21 00:50:26,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:26,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435806198] [2020-07-21 00:50:26,954 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:27,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:27,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:27,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:50:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 89 proven. 260 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2020-07-21 00:50:27,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:28,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 87 proven. 276 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2020-07-21 00:50:29,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435806198] [2020-07-21 00:50:29,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:29,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 00:50:29,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246833880] [2020-07-21 00:50:29,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 00:50:29,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:29,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 00:50:29,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:50:29,614 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 19 states. [2020-07-21 00:50:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:29,966 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2020-07-21 00:50:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:50:29,967 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 189 [2020-07-21 00:50:29,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:29,968 INFO L225 Difference]: With dead ends: 137 [2020-07-21 00:50:29,968 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:50:29,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 347 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:50:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:50:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:50:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:50:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:50:29,973 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 189 [2020-07-21 00:50:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:29,973 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:50:29,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 00:50:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:50:29,973 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:50:30,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:30,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:50:30,972 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 58 [2020-07-21 00:50:31,289 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 33 [2020-07-21 00:50:31,461 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 67 [2020-07-21 00:50:31,786 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 58 [2020-07-21 00:50:32,078 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 58 [2020-07-21 00:50:32,317 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 33 [2020-07-21 00:50:32,527 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 33 [2020-07-21 00:50:32,943 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 33 [2020-07-21 00:50:33,123 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 33 [2020-07-21 00:50:33,342 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 33 [2020-07-21 00:50:33,626 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 58 [2020-07-21 00:50:33,797 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 33 [2020-07-21 00:50:33,983 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 58 [2020-07-21 00:50:34,137 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 58 [2020-07-21 00:50:34,250 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 33 [2020-07-21 00:50:34,374 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 58 [2020-07-21 00:50:34,543 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 66 [2020-07-21 00:50:34,775 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 33 [2020-07-21 00:50:34,931 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 55 [2020-07-21 00:50:35,051 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 58 [2020-07-21 00:50:35,375 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 58 [2020-07-21 00:50:35,649 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 58 [2020-07-21 00:50:36,077 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 58 [2020-07-21 00:50:36,488 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 75 [2020-07-21 00:50:36,595 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 47 [2020-07-21 00:50:36,718 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 58 [2020-07-21 00:50:36,823 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 47 [2020-07-21 00:50:36,984 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 66 [2020-07-21 00:50:37,280 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 75 [2020-07-21 00:50:37,565 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 75 [2020-07-21 00:50:37,686 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 77 [2020-07-21 00:50:37,888 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 67 [2020-07-21 00:50:38,056 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 66 [2020-07-21 00:50:38,200 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 58 [2020-07-21 00:50:38,454 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 75 [2020-07-21 00:50:38,670 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 67 [2020-07-21 00:50:38,940 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 75 [2020-07-21 00:50:39,186 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 67 [2020-07-21 00:50:39,296 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 47 [2020-07-21 00:50:39,552 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 75 [2020-07-21 00:50:39,659 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 47 [2020-07-21 00:50:39,941 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 75 [2020-07-21 00:50:40,185 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 67 [2020-07-21 00:50:40,429 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 67 [2020-07-21 00:50:40,654 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 67 [2020-07-21 00:50:40,912 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 75 [2020-07-21 00:50:41,163 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 67 [2020-07-21 00:50:41,366 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 67 [2020-07-21 00:50:41,608 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 40 [2020-07-21 00:50:41,868 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 75 [2020-07-21 00:50:42,761 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 26 [2020-07-21 00:50:43,491 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 29 [2020-07-21 00:50:43,497 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:50:43,497 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:50:43,497 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:50:43,497 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:50:43,497 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:50:43,498 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:50:43,498 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 00:50:43,498 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 00:50:43,498 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 00:50:43,498 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 00:50:43,498 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 00:50:43,498 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 00:50:43,499 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2020-07-21 00:50:43,499 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 00:50:43,499 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 00:50:43,499 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 00:50:43,499 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 00:50:43,499 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 00:50:43,499 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (or (and (= 3 |fibo2_#t~ret2|) (<= 5 |fibo2_#in~n|)) (and (<= 4 |fibo2_#in~n|) (<= |fibo2_#in~n| 4) (= 2 |fibo2_#t~ret2|)) (<= 6 |fibo2_#in~n|) (and (= 1 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 3))) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 00:50:43,499 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 00:50:43,499 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 00:50:43,499 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 00:50:43,500 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 00:50:43,500 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 00:50:43,500 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 00:50:43,500 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 00:50:43,500 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 00:50:43,501 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse2 (= 1 |fibo1_#t~ret0|))) (let ((.cse0 (and (<= |fibo1_#in~n| 2) .cse2)) (.cse1 (and (<= 3 |fibo1_#in~n|) .cse2 (<= |fibo1_#in~n| 3)))) (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (or .cse0 .cse1 (<= 4 |fibo1_#in~n|)) (or (= 5 |fibo1_#t~ret0|) (<= 7 |fibo1_#in~n|) (<= |fibo1_#in~n| 5)) (<= |fibo1_#in~n| fibo1_~n) (or (<= 5 |fibo1_#in~n|) .cse0 (= 2 |fibo1_#t~ret0|) .cse1)))) [2020-07-21 00:50:43,501 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 00:50:43,501 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 00:50:43,501 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 00:50:43,501 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 00:50:43,501 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 00:50:43,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:50:43 BoogieIcfgContainer [2020-07-21 00:50:43,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:50:43,512 INFO L168 Benchmark]: Toolchain (without parser) took 83344.01 ms. Allocated memory was 137.9 MB in the beginning and 833.6 MB in the end (delta: 695.7 MB). Free memory was 102.4 MB in the beginning and 665.5 MB in the end (delta: -563.2 MB). Peak memory consumption was 726.5 MB. Max. memory is 7.1 GB. [2020-07-21 00:50:43,512 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 00:50:43,513 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.09 ms. Allocated memory is still 137.9 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 00:50:43,513 INFO L168 Benchmark]: Boogie Preprocessor took 112.41 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.4 MB in the beginning and 181.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:50:43,513 INFO L168 Benchmark]: RCFGBuilder took 271.43 ms. Allocated memory is still 201.9 MB. Free memory was 181.1 MB in the beginning and 167.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 00:50:43,514 INFO L168 Benchmark]: TraceAbstraction took 82677.41 ms. Allocated memory was 201.9 MB in the beginning and 833.6 MB in the end (delta: 631.8 MB). Free memory was 166.6 MB in the beginning and 665.5 MB in the end (delta: -499.0 MB). Peak memory consumption was 726.7 MB. Max. memory is 7.1 GB. [2020-07-21 00:50:43,516 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.09 ms. Allocated memory is still 137.9 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.41 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.4 MB in the beginning and 181.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 271.43 ms. Allocated memory is still 201.9 MB. Free memory was 181.1 MB in the beginning and 167.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 82677.41 ms. Allocated memory was 201.9 MB in the beginning and 833.6 MB in the end (delta: 631.8 MB). Free memory was 166.6 MB in the beginning and 665.5 MB in the end (delta: -499.0 MB). Peak memory consumption was 726.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 69.2s, OverallIterations: 38, TraceHistogramMax: 18, AutomataDifference: 10.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 13.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1120 SDtfs, 1373 SDslu, 8036 SDs, 0 SdLazy, 7206 SolverSat, 1036 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10745 GetRequests, 9751 SyntacticMatches, 344 SemanticMatches, 650 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=148occurred in iteration=29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 38 MinimizatonAttempts, 675 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 224 PreInvPairs, 4971 NumberOfFragments, 136 HoareAnnotationTreeSize, 224 FomulaSimplifications, 533434441 FormulaSimplificationTreeSizeReduction, 11.6s HoareSimplificationTime, 11 FomulaSimplificationsInter, 33493 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 44.1s InterpolantComputationTime, 5312 NumberOfCodeBlocks, 3583 NumberOfCodeBlocksAsserted, 98 NumberOfCheckSat, 10523 ConstructedInterpolants, 0 QuantifiedInterpolants, 2881895 SizeOfPredicates, 197 NumberOfNonLiveVariables, 7977 ConjunctsInSsa, 505 ConjunctsInUnsatCore, 74 InterpolantComputations, 2 PerfectInterpolantSequences, 36768/44544 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...