/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:30:00,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:30:00,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:30:00,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:30:00,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:30:00,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:30:00,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:30:00,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:30:00,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:30:00,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:30:00,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:30:00,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:30:00,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:30:00,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:30:00,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:30:00,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:30:00,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:30:00,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:30:00,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:30:00,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:30:00,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:30:00,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:30:00,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:30:00,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:30:00,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:30:00,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:30:00,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:30:00,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:30:00,941 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:30:00,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:30:00,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:30:00,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:30:00,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:30:00,963 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:30:00,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:30:00,964 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:30:00,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:30:00,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:30:00,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:30:00,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:30:00,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:30:00,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:30:00,965 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:30:00,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:30:00,965 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:30:00,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:30:00,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:30:00,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:30:00,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:30:00,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:30:00,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:30:00,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:30:00,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:30:00,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:30:00,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:30:00,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:00,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:30:00,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:30:00,968 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 -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:30:01,312 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:30:01,338 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:30:01,344 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:30:01,346 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:30:01,350 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:30:01,353 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-2.c [2020-07-20 21:30:01,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bad3f792c/5aff0ae0cdc745449de95bfa4ee6579e/FLAG70353fdcc [2020-07-20 21:30:02,195 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:30:02,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_25-2.c [2020-07-20 21:30:02,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bad3f792c/5aff0ae0cdc745449de95bfa4ee6579e/FLAG70353fdcc [2020-07-20 21:30:02,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bad3f792c/5aff0ae0cdc745449de95bfa4ee6579e [2020-07-20 21:30:02,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:30:02,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:30:02,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:30:02,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:30:02,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:30:02,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:30:02" (1/1) ... [2020-07-20 21:30:02,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f0e332a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:30:02, skipping insertion in model container [2020-07-20 21:30:02,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:30:02" (1/1) ... [2020-07-20 21:30:02,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:30:02,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:30:02,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:30:02,806 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:30:02,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:30:02,847 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:30:02,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:30:02 WrapperNode [2020-07-20 21:30:02,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:30:02,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:30:02,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:30:02,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:30:02,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:30:02" (1/1) ... [2020-07-20 21:30:02,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:30:02" (1/1) ... [2020-07-20 21:30:02,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:30:02" (1/1) ... [2020-07-20 21:30:02,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:30:02" (1/1) ... [2020-07-20 21:30:02,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:30:02" (1/1) ... [2020-07-20 21:30:03,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:30:02" (1/1) ... [2020-07-20 21:30:03,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:30:02" (1/1) ... [2020-07-20 21:30:03,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:30:03,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:30:03,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:30:03,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:30:03,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:30:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:30:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:30:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:30:03,102 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 21:30:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 21:30:03,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:30:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:30:03,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 21:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 21:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:30:03,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:30:03,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:30:03,398 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:30:03,399 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:30:03,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:30:03 BoogieIcfgContainer [2020-07-20 21:30:03,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:30:03,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:30:03,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:30:03,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:30:03,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:30:02" (1/3) ... [2020-07-20 21:30:03,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ca478a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:30:03, skipping insertion in model container [2020-07-20 21:30:03,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:30:02" (2/3) ... [2020-07-20 21:30:03,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ca478a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:30:03, skipping insertion in model container [2020-07-20 21:30:03,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:30:03" (3/3) ... [2020-07-20 21:30:03,420 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-2.c [2020-07-20 21:30:03,437 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:30:03,475 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:30:03,503 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:30:03,572 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:30:03,572 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:30:03,572 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:30:03,573 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:30:03,573 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:30:03,573 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:30:03,574 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:30:03,574 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:30:03,607 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 21:30:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:30:03,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:03,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:03,622 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:03,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 21:30:03,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:03,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770998164] [2020-07-20 21:30:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:03,733 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:30:03,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:03,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:30:03,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:30:03,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:30:03,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770998164] [2020-07-20 21:30:03,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:30:03,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:30:03,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481724089] [2020-07-20 21:30:03,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:30:03,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:30:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:30:03,913 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 21:30:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:04,074 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 21:30:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:30:04,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 21:30:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:04,094 INFO L225 Difference]: With dead ends: 44 [2020-07-20 21:30:04,095 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 21:30:04,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:30:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 21:30:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 21:30:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:30:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 21:30:04,184 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 21:30:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:04,185 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 21:30:04,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:30:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 21:30:04,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:30:04,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:04,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:04,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:04,406 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:04,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:04,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 21:30:04,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:04,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616049677] [2020-07-20 21:30:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:04,438 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:30:04,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:04,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:30:04,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:30:04,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:30:04,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616049677] [2020-07-20 21:30:04,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:30:04,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:30:04,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679658282] [2020-07-20 21:30:04,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:30:04,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:04,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:30:04,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:30:04,499 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 21:30:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:04,654 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 21:30:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:30:04,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 21:30:04,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:04,658 INFO L225 Difference]: With dead ends: 36 [2020-07-20 21:30:04,659 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 21:30:04,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:30:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 21:30:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 21:30:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 21:30:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 21:30:04,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 21:30:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:04,675 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 21:30:04,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:30:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 21:30:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:30:04,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:04,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:04,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:04,894 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:04,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 21:30:04,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:04,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688803244] [2020-07-20 21:30:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:04,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:30:04,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:04,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:30:04,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:30:05,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:05,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:05,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:30:05,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688803244] [2020-07-20 21:30:05,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:05,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 21:30:05,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511367599] [2020-07-20 21:30:05,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:30:05,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:05,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:30:05,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:30:05,578 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 21:30:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:05,793 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 21:30:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:30:05,795 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 21:30:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:05,797 INFO L225 Difference]: With dead ends: 41 [2020-07-20 21:30:05,797 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 21:30:05,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:30:05,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 21:30:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 21:30:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 21:30:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 21:30:05,812 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 21:30:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:05,813 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 21:30:05,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:30:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 21:30:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:30:05,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:05,820 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:06,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:06,029 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 21:30:06,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:06,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341176196] [2020-07-20 21:30:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:06,077 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:06,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:06,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:30:06,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:30:06,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:06,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:06,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:30:06,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341176196] [2020-07-20 21:30:06,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:06,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 21:30:06,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65679259] [2020-07-20 21:30:06,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 21:30:06,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:06,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 21:30:06,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 21:30:06,416 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 21:30:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:06,594 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 21:30:06,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:30:06,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 21:30:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:06,597 INFO L225 Difference]: With dead ends: 46 [2020-07-20 21:30:06,597 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 21:30:06,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:30:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 21:30:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 21:30:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 21:30:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 21:30:06,611 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 21:30:06,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:06,612 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 21:30:06,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 21:30:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 21:30:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 21:30:06,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:06,615 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:06,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:06,829 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:06,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:06,830 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 21:30:06,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:06,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700276044] [2020-07-20 21:30:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:06,881 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:06,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:06,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:30:06,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 21:30:06,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:07,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:07,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:07,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:30:07,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700276044] [2020-07-20 21:30:07,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:07,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 21:30:07,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775365846] [2020-07-20 21:30:07,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 21:30:07,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:07,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 21:30:07,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:30:07,452 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 21:30:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:07,685 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 21:30:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:30:07,686 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 21:30:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:07,690 INFO L225 Difference]: With dead ends: 51 [2020-07-20 21:30:07,690 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 21:30:07,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:30:07,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 21:30:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 21:30:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 21:30:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 21:30:07,704 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 21:30:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:07,704 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 21:30:07,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 21:30:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 21:30:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 21:30:07,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:07,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:07,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:07,918 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 21:30:07,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:07,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897165152] [2020-07-20 21:30:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:07,957 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:07,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:30:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 21:30:08,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:08,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:08,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:08,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:30:08,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897165152] [2020-07-20 21:30:08,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:08,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 21:30:08,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812629353] [2020-07-20 21:30:08,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 21:30:08,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:08,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 21:30:08,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:30:08,401 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 21:30:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:08,632 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 21:30:08,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:30:08,636 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 21:30:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:08,642 INFO L225 Difference]: With dead ends: 56 [2020-07-20 21:30:08,643 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 21:30:08,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:30:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 21:30:08,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 21:30:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 21:30:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 21:30:08,676 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 21:30:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:08,683 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 21:30:08,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 21:30:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 21:30:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 21:30:08,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:08,691 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:08,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:08,892 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:08,894 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 21:30:08,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:08,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374306003] [2020-07-20 21:30:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:08,950 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:08,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:08,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:30:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 21:30:09,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:09,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:09,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:09,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:09,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 21:30:09,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374306003] [2020-07-20 21:30:09,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:09,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 21:30:09,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962616880] [2020-07-20 21:30:09,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:30:09,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:09,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:30:09,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:30:09,765 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 21:30:10,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:10,032 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 21:30:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:30:10,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 21:30:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:10,036 INFO L225 Difference]: With dead ends: 61 [2020-07-20 21:30:10,036 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 21:30:10,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:30:10,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 21:30:10,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 21:30:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 21:30:10,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 21:30:10,051 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 21:30:10,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:10,051 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 21:30:10,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:30:10,052 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 21:30:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 21:30:10,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:10,055 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:10,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:10,265 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:10,266 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 21:30:10,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:10,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705932514] [2020-07-20 21:30:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:10,318 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:10,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:10,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:30:10,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 21:30:10,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:10,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:10,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:10,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:10,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:10,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 21:30:11,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705932514] [2020-07-20 21:30:11,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:11,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 21:30:11,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964008703] [2020-07-20 21:30:11,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:30:11,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:30:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 21:30:11,045 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-20 21:30:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:11,302 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 21:30:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:30:11,303 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 21:30:11,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:11,307 INFO L225 Difference]: With dead ends: 66 [2020-07-20 21:30:11,308 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 21:30:11,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:30:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 21:30:11,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 21:30:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 21:30:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 21:30:11,333 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 21:30:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:11,336 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 21:30:11,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:30:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 21:30:11,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 21:30:11,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:11,347 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:11,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:11,561 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 21:30:11,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:11,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012159874] [2020-07-20 21:30:11,563 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:11,634 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:11,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:11,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:30:11,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 21:30:11,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:12,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:12,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:12,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:12,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:12,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:12,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:12,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 21:30:12,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012159874] [2020-07-20 21:30:12,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:12,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 21:30:12,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617115803] [2020-07-20 21:30:12,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:30:12,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:30:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:30:12,923 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-20 21:30:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:13,237 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 21:30:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:30:13,238 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-20 21:30:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:13,241 INFO L225 Difference]: With dead ends: 71 [2020-07-20 21:30:13,242 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 21:30:13,243 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 [2020-07-20 21:30:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 21:30:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 21:30:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 21:30:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 21:30:13,258 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 21:30:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:13,259 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 21:30:13,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:30:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 21:30:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 21:30:13,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:13,262 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:13,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:13,478 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:13,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:13,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 21:30:13,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:13,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16729255] [2020-07-20 21:30:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:13,567 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:13,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:13,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:30:13,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 21:30:13,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:14,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:14,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:14,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:14,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 21:30:14,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16729255] [2020-07-20 21:30:14,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:14,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 21:30:14,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380820672] [2020-07-20 21:30:14,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 21:30:14,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:14,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 21:30:14,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 21:30:14,770 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-20 21:30:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:15,083 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-20 21:30:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:30:15,087 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-20 21:30:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:15,090 INFO L225 Difference]: With dead ends: 76 [2020-07-20 21:30:15,091 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 21:30:15,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:30:15,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 21:30:15,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 21:30:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 21:30:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 21:30:15,132 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-20 21:30:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:15,133 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 21:30:15,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 21:30:15,138 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 21:30:15,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 21:30:15,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:15,143 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:15,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:15,362 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-20 21:30:15,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:15,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644134219] [2020-07-20 21:30:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:15,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:15,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:15,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:30:15,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-20 21:30:15,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:16,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:17,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:17,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:17,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:17,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:17,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:17,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:17,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-20 21:30:17,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644134219] [2020-07-20 21:30:17,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:17,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 21:30:17,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944240178] [2020-07-20 21:30:17,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:30:17,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:17,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:30:17,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:30:17,578 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-20 21:30:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:17,953 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-20 21:30:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:30:17,961 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-20 21:30:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:17,965 INFO L225 Difference]: With dead ends: 81 [2020-07-20 21:30:17,965 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 21:30:17,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:30:17,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 21:30:17,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-20 21:30:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 21:30:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 21:30:17,992 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-20 21:30:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:17,993 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 21:30:17,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:30:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 21:30:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 21:30:17,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:17,996 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:18,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:18,209 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-20 21:30:18,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:18,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805864515] [2020-07-20 21:30:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:18,299 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:18,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:30:18,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-20 21:30:18,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:19,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:19,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:19,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:19,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:19,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:19,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:20,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-20 21:30:20,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805864515] [2020-07-20 21:30:20,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:20,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 21:30:20,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499019765] [2020-07-20 21:30:20,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:30:20,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:20,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:30:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:30:20,131 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-20 21:30:20,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:20,477 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-20 21:30:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:30:20,477 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-20 21:30:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:20,480 INFO L225 Difference]: With dead ends: 86 [2020-07-20 21:30:20,480 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 21:30:20,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:30:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 21:30:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-20 21:30:20,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 21:30:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 21:30:20,494 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-20 21:30:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:20,494 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 21:30:20,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:30:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 21:30:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-20 21:30:20,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:20,498 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:20,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:20,712 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:20,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-20 21:30:20,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:20,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163832608] [2020-07-20 21:30:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:20,875 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:20,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:20,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:30:20,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-20 21:30:21,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:22,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:22,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:22,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:23,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:23,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:23,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:23,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:23,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:23,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:23,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:23,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-20 21:30:23,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163832608] [2020-07-20 21:30:23,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:23,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 21:30:23,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248381764] [2020-07-20 21:30:23,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:30:23,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:23,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:30:23,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:30:23,574 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-20 21:30:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:24,047 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-20 21:30:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:30:24,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-20 21:30:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:24,051 INFO L225 Difference]: With dead ends: 91 [2020-07-20 21:30:24,052 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 21:30:24,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:30:24,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 21:30:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-20 21:30:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 21:30:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 21:30:24,066 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-20 21:30:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:24,067 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 21:30:24,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:30:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 21:30:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 21:30:24,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:24,072 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:24,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:24,287 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-20 21:30:24,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:24,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078362663] [2020-07-20 21:30:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:24,475 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:24,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:24,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:30:24,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-20 21:30:24,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:26,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:26,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:26,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:27,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:27,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:27,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:27,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:27,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-20 21:30:27,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078362663] [2020-07-20 21:30:27,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:27,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 21:30:27,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663589927] [2020-07-20 21:30:27,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:30:27,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:27,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:30:27,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:30:27,633 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-20 21:30:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:28,126 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-20 21:30:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:30:28,127 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-20 21:30:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:28,135 INFO L225 Difference]: With dead ends: 96 [2020-07-20 21:30:28,135 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 21:30:28,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:30:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 21:30:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-20 21:30:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 21:30:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 21:30:28,165 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-20 21:30:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:28,168 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 21:30:28,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:30:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 21:30:28,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 21:30:28,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:28,174 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:28,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:28,388 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:28,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:28,390 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-20 21:30:28,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:28,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877643118] [2020-07-20 21:30:28,391 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:28,652 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:28,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:28,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:30:28,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-20 21:30:28,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:31,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:31,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:32,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:32,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:32,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:32,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:33,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:33,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:33,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:33,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:33,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-20 21:30:33,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877643118] [2020-07-20 21:30:33,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:33,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-20 21:30:33,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935609174] [2020-07-20 21:30:33,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:30:33,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:30:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:30:33,602 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-20 21:30:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:34,300 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-20 21:30:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:30:34,302 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-20 21:30:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:34,306 INFO L225 Difference]: With dead ends: 101 [2020-07-20 21:30:34,306 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 21:30:34,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:30:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 21:30:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-20 21:30:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 21:30:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 21:30:34,324 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-20 21:30:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:34,325 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 21:30:34,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:30:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 21:30:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 21:30:34,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:34,331 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:34,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:34,543 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:34,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:34,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-20 21:30:34,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:34,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279674072] [2020-07-20 21:30:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:34,825 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:34,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:34,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:30:34,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-20 21:30:35,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:37,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:37,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:38,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:39,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:39,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:39,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:39,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:39,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:39,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-20 21:30:40,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279674072] [2020-07-20 21:30:40,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:40,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-20 21:30:40,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201223145] [2020-07-20 21:30:40,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:30:40,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:40,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:30:40,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:30:40,084 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-20 21:30:40,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:40,753 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-20 21:30:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:30:40,754 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-20 21:30:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:40,758 INFO L225 Difference]: With dead ends: 106 [2020-07-20 21:30:40,758 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 21:30:40,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:30:40,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 21:30:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-20 21:30:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 21:30:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 21:30:40,775 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-20 21:30:40,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:40,776 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 21:30:40,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:30:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 21:30:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-20 21:30:40,786 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:40,787 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:41,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:41,003 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:41,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-20 21:30:41,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:41,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265443576] [2020-07-20 21:30:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:41,442 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:41,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:41,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:30:41,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-20 21:30:41,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:46,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:47,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:48,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:48,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:49,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:49,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:49,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:49,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:50,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:50,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:50,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:50,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-20 21:30:50,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265443576] [2020-07-20 21:30:50,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:50,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-20 21:30:50,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256724680] [2020-07-20 21:30:50,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:30:50,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:50,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:30:50,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:30:50,584 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-20 21:30:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:30:51,189 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-20 21:30:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:30:51,189 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-20 21:30:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:30:51,193 INFO L225 Difference]: With dead ends: 111 [2020-07-20 21:30:51,193 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 21:30:51,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:30:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 21:30:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-20 21:30:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 21:30:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-20 21:30:51,208 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-20 21:30:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:30:51,209 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-20 21:30:51,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:30:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-20 21:30:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-20 21:30:51,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:30:51,213 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:30:51,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:51,429 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:30:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:30:51,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-20 21:30:51,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:30:51,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044028823] [2020-07-20 21:30:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:30:51,801 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:30:51,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:30:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:30:51,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:30:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-20 21:30:52,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:30:55,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:56,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:56,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:57,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:58,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:58,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:58,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:58,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:58,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:58,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:58,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:30:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-20 21:30:59,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044028823] [2020-07-20 21:30:59,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:30:59,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-20 21:30:59,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794501213] [2020-07-20 21:30:59,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:30:59,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:30:59,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:30:59,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:30:59,071 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 24 states. [2020-07-20 21:31:00,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:31:00,146 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-20 21:31:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:31:00,148 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 418 [2020-07-20 21:31:00,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:31:00,153 INFO L225 Difference]: With dead ends: 116 [2020-07-20 21:31:00,154 INFO L226 Difference]: Without dead ends: 112 [2020-07-20 21:31:00,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:31:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-20 21:31:00,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-20 21:31:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 21:31:00,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-20 21:31:00,174 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-20 21:31:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:31:00,175 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-20 21:31:00,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:31:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-20 21:31:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2020-07-20 21:31:00,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:31:00,187 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 46, 45, 45, 34, 34, 34, 34, 34, 34, 34, 34, 22, 22, 22, 22, 22, 22, 22, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:31:00,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:31:00,401 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:31:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:31:00,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1563866591, now seen corresponding path program 8 times [2020-07-20 21:31:00,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:31:00,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553125355] [2020-07-20 21:31:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:31:00,915 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:31:00,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:31:00,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:31:00,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:31:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2323 refuted. 0 times theorem prover too weak. 14314 trivial. 0 not checked. [2020-07-20 21:31:01,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:31:03,438 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-20 21:31:06,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:06,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:08,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:08,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:10,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:11,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:11,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:11,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:11,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:11,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:12,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:12,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:12,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:12,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:12,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2375 refuted. 0 times theorem prover too weak. 14262 trivial. 0 not checked. [2020-07-20 21:31:12,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553125355] [2020-07-20 21:31:12,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:31:12,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-20 21:31:12,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367794476] [2020-07-20 21:31:12,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 21:31:12,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:31:12,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 21:31:12,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:31:12,559 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 26 states. [2020-07-20 21:31:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:31:13,283 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-20 21:31:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 21:31:13,285 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 741 [2020-07-20 21:31:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:31:13,289 INFO L225 Difference]: With dead ends: 121 [2020-07-20 21:31:13,289 INFO L226 Difference]: Without dead ends: 117 [2020-07-20 21:31:13,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1439 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 21:31:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-20 21:31:13,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-20 21:31:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 21:31:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-20 21:31:13,307 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 741 [2020-07-20 21:31:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:31:13,308 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-20 21:31:13,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 21:31:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-20 21:31:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-20 21:31:13,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:31:13,320 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 55, 55, 53, 37, 37, 37, 37, 37, 37, 37, 37, 27, 27, 27, 27, 27, 27, 27, 26, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:31:13,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:31:13,535 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:31:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:31:13,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2100501163, now seen corresponding path program 4 times [2020-07-20 21:31:13,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:31:13,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815039431] [2020-07-20 21:31:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:31:14,098 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:31:14,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:31:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 21:31:14,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:31:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2821 refuted. 0 times theorem prover too weak. 19575 trivial. 0 not checked. [2020-07-20 21:31:14,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:31:20,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:20,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:23,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:24,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:24,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:26,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:26,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:27,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:27,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:27,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:27,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:27,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2877 refuted. 0 times theorem prover too weak. 19519 trivial. 0 not checked. [2020-07-20 21:31:28,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815039431] [2020-07-20 21:31:28,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:31:28,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-20 21:31:28,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307616783] [2020-07-20 21:31:28,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 21:31:28,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:31:28,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 21:31:28,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:31:28,292 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 26 states. [2020-07-20 21:31:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:31:29,409 INFO L93 Difference]: Finished difference Result 126 states and 350 transitions. [2020-07-20 21:31:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 21:31:29,411 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 871 [2020-07-20 21:31:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:31:29,416 INFO L225 Difference]: With dead ends: 126 [2020-07-20 21:31:29,417 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 21:31:29,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1698 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 21:31:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 21:31:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-20 21:31:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 21:31:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-20 21:31:29,438 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 871 [2020-07-20 21:31:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:31:29,440 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-20 21:31:29,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 21:31:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-20 21:31:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-07-20 21:31:29,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:31:29,478 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 110, 110, 94, 74, 74, 74, 74, 74, 74, 74, 74, 55, 55, 55, 55, 55, 55, 55, 55, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:31:29,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:31:29,692 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:31:29,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:31:29,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1326645612, now seen corresponding path program 9 times [2020-07-20 21:31:29,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:31:29,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228807725] [2020-07-20 21:31:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:31:30,661 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:31:30,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:31:30,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 21:31:30,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:31:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6392 refuted. 0 times theorem prover too weak. 81780 trivial. 0 not checked. [2020-07-20 21:31:32,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:31:34,355 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:31:43,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:43,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:47,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:50,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:51,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:53,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:53,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:54,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:54,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:54,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:54,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:55,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:55,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:55,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:31:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6457 refuted. 0 times theorem prover too weak. 81715 trivial. 0 not checked. [2020-07-20 21:31:56,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228807725] [2020-07-20 21:31:56,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:31:56,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-20 21:31:56,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784807993] [2020-07-20 21:31:56,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 21:31:56,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:31:56,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 21:31:56,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:31:56,774 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 28 states. [2020-07-20 21:31:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:31:58,073 INFO L93 Difference]: Finished difference Result 131 states and 376 transitions. [2020-07-20 21:31:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 21:31:58,075 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1690 [2020-07-20 21:31:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:31:58,081 INFO L225 Difference]: With dead ends: 131 [2020-07-20 21:31:58,082 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 21:31:58,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3392 GetRequests, 3333 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 21:31:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 21:31:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2020-07-20 21:31:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 21:31:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-20 21:31:58,102 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1690 [2020-07-20 21:31:58,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:31:58,104 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-20 21:31:58,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 21:31:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-20 21:31:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1433 [2020-07-20 21:31:58,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:31:58,130 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 92, 92, 87, 60, 60, 60, 60, 60, 60, 60, 60, 46, 46, 46, 46, 46, 46, 46, 41, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:31:58,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:31:58,344 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:31:58,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:31:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash -37703149, now seen corresponding path program 5 times [2020-07-20 21:31:58,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:31:58,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377169961] [2020-07-20 21:31:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:31:59,184 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:31:59,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:31:59,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 2684 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 21:31:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:32:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5319 refuted. 0 times theorem prover too weak. 56349 trivial. 0 not checked. [2020-07-20 21:32:00,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:32:03,731 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:32:03,845 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 21:32:03,956 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 21:32:04,068 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:32:10,414 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:32:10,522 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:32:10,632 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:32:10,956 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:32:11,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:11,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:15,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:15,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:17,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:17,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:19,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:21,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:22,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:22,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:22,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:23,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:23,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:23,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5389 refuted. 0 times theorem prover too weak. 56279 trivial. 0 not checked. [2020-07-20 21:32:24,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377169961] [2020-07-20 21:32:24,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:32:24,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-20 21:32:24,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732683439] [2020-07-20 21:32:24,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 21:32:24,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:32:24,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 21:32:24,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:32:24,584 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 28 states. [2020-07-20 21:32:25,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:32:25,904 INFO L93 Difference]: Finished difference Result 136 states and 404 transitions. [2020-07-20 21:32:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 21:32:25,910 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1432 [2020-07-20 21:32:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:32:25,914 INFO L225 Difference]: With dead ends: 136 [2020-07-20 21:32:25,914 INFO L226 Difference]: Without dead ends: 132 [2020-07-20 21:32:25,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2875 GetRequests, 2816 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 21:32:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-20 21:32:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-07-20 21:32:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 21:32:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-20 21:32:25,939 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1432 [2020-07-20 21:32:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:32:25,940 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-20 21:32:25,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 21:32:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-20 21:32:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1990 [2020-07-20 21:32:25,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:32:25,991 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 112, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 64, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:32:26,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:32:26,205 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:32:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:32:26,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1412849447, now seen corresponding path program 10 times [2020-07-20 21:32:26,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:32:26,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539016541] [2020-07-20 21:32:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:32:27,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:32:27,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:32:27,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 3754 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 21:32:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:32:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8137 refuted. 0 times theorem prover too weak. 114500 trivial. 0 not checked. [2020-07-20 21:32:29,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:32:32,502 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:32:33,250 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:32:33,357 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:32:33,466 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:32:33,574 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:32:34,486 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:32:34,609 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:32:34,738 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 21:32:34,863 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 21:32:35,031 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 21:32:35,144 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 21:32:35,263 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:32:35,366 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 21:32:44,283 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:32:44,826 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:32:44,940 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:32:45,569 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:32:45,695 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:32:45,832 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:32:45,962 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:32:46,092 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:32:46,210 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:32:46,323 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:32:46,429 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:32:46,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:46,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:52,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:56,200 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:32:56,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:56,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:32:59,786 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 21:33:01,986 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:33:02,090 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:33:02,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:05,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:07,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:07,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:08,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:08,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:09,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:09,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:09,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:09,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:10,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8217 refuted. 0 times theorem prover too weak. 114420 trivial. 0 not checked. [2020-07-20 21:33:12,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539016541] [2020-07-20 21:33:12,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:33:12,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-20 21:33:12,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175407834] [2020-07-20 21:33:12,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 21:33:12,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:33:12,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 21:33:12,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:33:12,076 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 30 states. [2020-07-20 21:33:14,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:33:14,602 INFO L93 Difference]: Finished difference Result 141 states and 432 transitions. [2020-07-20 21:33:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 21:33:14,606 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1989 [2020-07-20 21:33:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:33:14,612 INFO L225 Difference]: With dead ends: 141 [2020-07-20 21:33:14,612 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 21:33:14,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3991 GetRequests, 3927 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 21:33:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 21:33:14,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-20 21:33:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 21:33:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-20 21:33:14,636 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 1989 [2020-07-20 21:33:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:33:14,638 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-20 21:33:14,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 21:33:14,638 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-20 21:33:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2050 [2020-07-20 21:33:14,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:33:14,683 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 124, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 60, 52, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:33:14,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:33:14,885 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:33:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:33:14,887 INFO L82 PathProgramCache]: Analyzing trace with hash 266934567, now seen corresponding path program 5 times [2020-07-20 21:33:14,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:33:14,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997774947] [2020-07-20 21:33:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:33:16,046 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:33:16,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:33:16,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 3844 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 21:33:16,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:33:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8506 refuted. 0 times theorem prover too weak. 119697 trivial. 0 not checked. [2020-07-20 21:33:19,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:33:21,743 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:33:22,685 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:33:22,789 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:33:24,664 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:33:24,776 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:33:31,813 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:33:31,918 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:33:32,021 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:33:32,386 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:33:32,502 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:33:32,640 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:33:32,772 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:33:33,915 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:33:34,063 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:33:34,210 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:33:34,359 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:33:35,219 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:33:35,366 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:33:35,521 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:33:35,673 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:33:35,826 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:33:35,966 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:33:36,101 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:33:36,228 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:33:36,350 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 21:33:36,461 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:33:36,567 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 21:33:37,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:37,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:43,413 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:33:43,523 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:33:43,894 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:33:44,014 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:33:44,136 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:33:44,264 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:33:45,239 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:33:45,374 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:33:45,503 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:33:45,627 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:33:45,758 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:33:45,890 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:33:46,010 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:33:46,127 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:33:46,236 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 21:33:46,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:54,494 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:33:54,970 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:33:55,078 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:33:55,194 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:33:55,311 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:33:55,665 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:33:55,772 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:33:55,882 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:33:55,996 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:33:56,106 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:33:56,214 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:33:56,329 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 21:33:56,435 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:33:56,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:56,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:33:59,699 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:33:59,802 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:34:00,295 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:34:00,407 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:34:00,523 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:34:00,642 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:34:00,794 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 21:34:01,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:03,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:03,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:04,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:05,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:06,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:06,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:06,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:06,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:07,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:34:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8591 refuted. 0 times theorem prover too weak. 119612 trivial. 0 not checked. [2020-07-20 21:34:09,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997774947] [2020-07-20 21:34:09,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:34:09,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-20 21:34:09,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296099054] [2020-07-20 21:34:09,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 21:34:09,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:34:09,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 21:34:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:34:09,322 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 30 states. [2020-07-20 21:34:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:34:12,255 INFO L93 Difference]: Finished difference Result 146 states and 462 transitions. [2020-07-20 21:34:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 21:34:12,260 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 2049 [2020-07-20 21:34:12,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:34:12,267 INFO L225 Difference]: With dead ends: 146 [2020-07-20 21:34:12,267 INFO L226 Difference]: Without dead ends: 142 [2020-07-20 21:34:12,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4046 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 21:34:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-20 21:34:12,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-07-20 21:34:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 21:34:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-20 21:34:12,292 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 2049 [2020-07-20 21:34:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:34:12,295 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-20 21:34:12,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 21:34:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-20 21:34:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3680 [2020-07-20 21:34:12,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:34:12,405 INFO L422 BasicCegarLoop]: trace histogram [329, 329, 236, 236, 211, 164, 164, 164, 164, 164, 164, 164, 164, 118, 118, 118, 118, 118, 118, 118, 118, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:34:12,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:34:12,607 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:34:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:34:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash -886096047, now seen corresponding path program 11 times [2020-07-20 21:34:12,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:34:12,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825100639] [2020-07-20 21:34:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:34:14,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:34:14,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:34:14,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 6936 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 21:34:14,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:34:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16770 refuted. 0 times theorem prover too weak. 408925 trivial. 0 not checked. [2020-07-20 21:34:20,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:34:23,412 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:34:23,520 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:34:24,213 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:34:24,326 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:34:24,449 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:34:24,564 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:34:26,029 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:34:26,149 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:34:26,274 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:34:26,391 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:34:27,187 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:34:27,350 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:34:27,521 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:34:27,695 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:34:29,347 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:34:29,523 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:34:29,710 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:34:29,898 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:34:33,048 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:34:33,223 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:34:33,415 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:34:33,612 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:34:33,787 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 21:34:33,959 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 21:34:34,119 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:34:34,272 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 21:34:34,415 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:34:34,549 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 21:34:34,693 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:34:34,830 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 21:34:34,959 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:34:35,066 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 21:34:53,338 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 21:34:55,877 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:34:55,987 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:34:56,493 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:34:56,611 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:34:57,403 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:34:57,534 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:34:57,678 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:34:57,803 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:34:59,440 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:34:59,597 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:34:59,759 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:34:59,918 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:35:00,900 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:35:01,047 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:35:01,201 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:35:01,358 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:35:03,001 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:35:03,191 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:35:03,396 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:35:03,592 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:35:03,779 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:35:03,950 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 21:35:04,126 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:35:04,286 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:35:04,431 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:35:04,578 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:35:04,726 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:35:04,858 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:35:04,983 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 21:35:05,101 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:35:05,209 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:35:05,318 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:35:05,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:35:18,512 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 21:35:18,724 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:35:19,923 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:35:20,217 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:35:21,744 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:35:21,879 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:35:22,035 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:35:22,177 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:35:23,272 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:35:23,446 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:35:23,629 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:35:23,807 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:35:23,987 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:35:24,143 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:35:24,299 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:35:24,449 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 21:35:24,591 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 21:35:24,724 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:35:24,851 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:35:24,969 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-20 21:35:25,077 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:35:25,184 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:35:25,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:35:32,285 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 21:35:32,396 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:35:32,514 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:35:32,896 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:35:33,019 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:35:33,139 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:35:33,258 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:35:34,089 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:35:34,225 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:35:34,367 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:35:34,501 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:35:36,217 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:35:36,376 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:35:36,545 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:35:36,714 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:35:36,872 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:35:37,021 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:35:37,161 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 21:35:37,299 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:35:37,427 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 21:35:37,544 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 21:35:37,655 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:35:37,759 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:35:38,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:35:38,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:35:47,111 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:35:47,221 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:35:47,607 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:35:47,733 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:35:47,868 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:35:48,006 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:35:48,913 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:35:49,046 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:35:49,187 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:35:49,317 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:35:49,455 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:35:49,589 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:35:49,715 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 21:35:49,820 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:35:50,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:35:56,672 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:35:56,776 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:35:57,116 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:35:57,225 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:35:57,341 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:35:57,459 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:35:57,577 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 21:35:57,691 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:35:57,804 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:35:57,910 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:35:58,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:35:58,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:01,051 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 21:36:01,158 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 21:36:01,583 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 21:36:01,700 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 21:36:01,825 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:36:01,947 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:36:02,061 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 21:36:02,167 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:36:02,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:05,671 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 21:36:05,777 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 21:36:06,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:06,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:07,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:09,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:09,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:10,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:10,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16866 refuted. 0 times theorem prover too weak. 408829 trivial. 0 not checked. [2020-07-20 21:36:16,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825100639] [2020-07-20 21:36:16,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:36:16,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-20 21:36:16,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58398382] [2020-07-20 21:36:16,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 21:36:16,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:36:16,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 21:36:16,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-20 21:36:16,022 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 32 states. [2020-07-20 21:36:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:36:17,785 INFO L93 Difference]: Finished difference Result 151 states and 492 transitions. [2020-07-20 21:36:17,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 21:36:17,788 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3679 [2020-07-20 21:36:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:36:17,796 INFO L225 Difference]: With dead ends: 151 [2020-07-20 21:36:17,796 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 21:36:17,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7372 GetRequests, 7303 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 21:36:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 21:36:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2020-07-20 21:36:17,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 21:36:17,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-20 21:36:17,816 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3679 [2020-07-20 21:36:17,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:36:17,819 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-20 21:36:17,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 21:36:17,819 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-20 21:36:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3365 [2020-07-20 21:36:17,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:36:17,895 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 214, 214, 208, 143, 143, 143, 143, 143, 143, 143, 143, 107, 107, 107, 107, 107, 107, 107, 101, 79, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:36:18,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:18,096 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:36:18,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:36:18,098 INFO L82 PathProgramCache]: Analyzing trace with hash 147049693, now seen corresponding path program 6 times [2020-07-20 21:36:18,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:36:18,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790502914] [2020-07-20 21:36:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:36:19,754 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:36:19,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:36:19,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 6302 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 21:36:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:36:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15526 refuted. 0 times theorem prover too weak. 332578 trivial. 0 not checked. [2020-07-20 21:36:24,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:36:29,127 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:36:29,231 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:36:29,342 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:36:29,461 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:36:30,622 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:36:30,738 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:36:30,854 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:36:30,956 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:36:31,072 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 21:36:31,188 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 21:36:31,290 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:36:46,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:46,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:36:55,341 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:36:55,448 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:36:56,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:06,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:06,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:10,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:13,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:15,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:16,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:17,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:17,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:18,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:18,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:18,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:37:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15628 refuted. 0 times theorem prover too weak. 332476 trivial. 0 not checked. [2020-07-20 21:37:22,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790502914] [2020-07-20 21:37:22,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:37:22,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-20 21:37:22,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080844541] [2020-07-20 21:37:22,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 21:37:22,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:37:22,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 21:37:22,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-20 21:37:22,221 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 32 states. [2020-07-20 21:37:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:37:23,808 INFO L93 Difference]: Finished difference Result 156 states and 524 transitions. [2020-07-20 21:37:23,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 21:37:23,810 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3364 [2020-07-20 21:37:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:37:23,817 INFO L225 Difference]: With dead ends: 156 [2020-07-20 21:37:23,817 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 21:37:23,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6741 GetRequests, 6672 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 21:37:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 21:37:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-20 21:37:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 21:37:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-20 21:37:23,838 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3364 [2020-07-20 21:37:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:37:23,841 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-20 21:37:23,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 21:37:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-20 21:37:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4616 [2020-07-20 21:37:24,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:37:24,064 INFO L422 BasicCegarLoop]: trace histogram [436, 436, 300, 273, 273, 218, 218, 218, 218, 218, 218, 218, 218, 136, 136, 136, 136, 136, 136, 136, 136, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:37:24,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:24,278 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:37:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:37:24,279 INFO L82 PathProgramCache]: Analyzing trace with hash -554675479, now seen corresponding path program 12 times [2020-07-20 21:37:24,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:37:24,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796195535] [2020-07-20 21:37:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:37:26,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:37:26,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:37:26,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 8700 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 21:37:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:37:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 22920 refuted. 0 times theorem prover too weak. 665925 trivial. 0 not checked. [2020-07-20 21:37:33,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:37:38,399 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:37:39,634 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:37:39,747 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:37:39,867 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:37:39,974 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:37:41,665 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:37:41,783 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:37:41,905 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:37:42,026 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:37:42,150 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-20 21:37:42,267 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-20 21:37:42,374 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 21:37:42,579 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:38:01,197 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:38:01,305 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:38:01,411 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:38:01,525 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:38:02,826 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:38:02,941 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:38:03,069 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:38:03,186 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:38:03,301 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 21:38:03,409 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 21:38:03,511 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 21:38:04,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:16,503 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:38:16,608 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:38:16,724 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:38:16,826 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:38:18,800 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:38:18,910 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:38:19,030 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:38:19,147 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:38:19,270 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:38:19,382 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 21:38:19,487 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:38:20,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:35,918 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 21:38:38,400 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:38:39,285 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:38:39,388 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:38:39,501 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:38:39,613 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:38:39,821 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:38:40,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:48,199 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:38:48,305 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:38:49,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:55,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:59,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:38:59,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:03,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:05,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:06,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:07,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:07,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:07,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:07,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:07,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:39:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 23034 refuted. 0 times theorem prover too weak. 665811 trivial. 0 not checked. [2020-07-20 21:39:15,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796195535] [2020-07-20 21:39:15,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:39:15,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-20 21:39:15,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712384437] [2020-07-20 21:39:15,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 21:39:15,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:39:15,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 21:39:15,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 21:39:15,153 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 34 states. [2020-07-20 21:39:17,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:39:17,688 INFO L93 Difference]: Finished difference Result 161 states and 556 transitions. [2020-07-20 21:39:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 21:39:17,692 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 4615 [2020-07-20 21:39:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:39:17,700 INFO L225 Difference]: With dead ends: 161 [2020-07-20 21:39:17,700 INFO L226 Difference]: Without dead ends: 157 [2020-07-20 21:39:17,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9245 GetRequests, 9171 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 21:39:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-20 21:39:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-07-20 21:39:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 21:39:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-20 21:39:17,722 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 4615 [2020-07-20 21:39:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:39:17,726 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-20 21:39:17,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 21:39:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-20 21:39:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9330 [2020-07-20 21:39:18,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:39:18,476 INFO L422 BasicCegarLoop]: trace histogram [846, 846, 625, 533, 533, 423, 423, 423, 423, 423, 423, 423, 423, 359, 266, 266, 266, 266, 266, 266, 266, 221, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:39:18,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:18,684 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:39:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:39:18,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1670319822, now seen corresponding path program 6 times [2020-07-20 21:39:18,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:39:18,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324101717] [2020-07-20 21:39:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:39:22,046 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:39:22,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:39:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 17449 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 21:39:22,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:39:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49554 refuted. 0 times theorem prover too weak. 2725114 trivial. 0 not checked. [2020-07-20 21:39:47,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:39:50,726 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:39:50,836 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:39:51,477 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:39:51,589 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:39:51,711 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:39:51,834 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:39:52,946 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:39:53,070 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:39:53,199 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:39:53,323 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:39:55,517 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:39:55,642 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:39:55,802 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:39:55,940 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:40:00,993 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:40:01,138 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:40:01,293 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:40:01,441 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:40:09,911 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:40:10,080 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:40:10,254 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:40:10,424 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 21:40:10,594 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-20 21:40:10,752 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-20 21:40:10,905 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 21:40:11,052 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 21:40:11,191 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 21:40:11,318 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 21:40:11,445 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 21:40:11,561 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 21:40:11,671 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:40:11,776 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:40:11,880 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:41:36,817 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:41:37,261 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:41:37,367 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:41:37,484 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:41:37,602 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:41:38,280 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:41:38,399 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:41:38,531 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:41:38,665 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:41:40,018 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:41:40,156 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:41:40,307 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:41:40,459 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:41:43,151 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:41:43,307 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:41:43,468 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:41:43,631 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:41:49,593 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:41:49,762 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 21:41:49,943 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:41:50,120 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 21:41:50,296 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 21:41:50,457 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-20 21:41:50,614 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:41:50,761 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 21:41:50,903 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:41:51,036 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:41:51,160 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:41:51,284 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:41:51,396 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:41:51,498 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 21:41:52,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:41:52,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:42:46,191 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:42:46,306 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:42:46,425 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:42:46,935 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:42:47,054 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:42:47,188 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:42:47,330 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:42:48,097 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:42:48,234 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:42:48,371 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:42:48,503 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:42:49,915 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:42:50,059 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:42:50,212 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:42:50,374 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:42:53,232 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:42:53,396 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:42:53,574 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:42:53,745 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 21:42:53,920 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 21:42:54,077 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 21:42:54,226 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:42:54,367 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:42:54,504 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 21:42:54,634 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 21:42:54,763 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 21:42:54,877 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:42:54,981 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 21:42:55,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:43:19,543 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 21:43:19,754 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:43:19,868 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 21:43:20,738 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:43:20,844 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:43:20,966 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:43:21,088 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 21:43:21,647 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:43:21,778 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:43:21,908 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:43:22,047 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 21:43:22,890 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:43:23,037 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 21:43:23,186 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:43:23,336 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:43:24,878 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:43:25,041 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 21:43:25,216 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:43:25,392 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 21:43:25,563 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 21:43:25,719 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 21:43:25,866 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 21:43:26,013 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 21:43:26,148 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 21:43:26,281 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 21:43:26,401 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 21:43:26,522 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 21:43:27,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts