/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:54:34,402 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 01:54:34,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:54:34,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:54:34,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:54:34,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:54:34,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:54:34,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:54:34,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:54:34,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:54:34,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:54:34,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:54:34,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:54:34,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:54:34,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:54:34,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:54:34,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:54:34,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:54:34,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 01:54:34,518 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:54:34,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:54:34,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:54:34,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:54:34,520 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:54:34,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:54:34,521 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:54:34,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:54:34,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:54:34,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:54:34,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:54:34,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:54:34,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:54:34,524 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:54:34,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:54:34,524 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:54:34,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:54:34,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:54:34,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:54:34,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:54:34,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:54:34,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:54:34,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:54:34,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:54:34,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:54:34,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:54:34,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:34,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:54:34,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:54:34,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:54:34,873 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:54:34,892 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:54:34,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:54:34,898 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:54:34,898 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:54:34,899 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-21 01:54:34,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df558cd11/2ccd55ebf3394a3498c55df06dec0913/FLAG8ce88ebd4 [2020-07-21 01:54:35,495 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:54:35,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-21 01:54:35,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df558cd11/2ccd55ebf3394a3498c55df06dec0913/FLAG8ce88ebd4 [2020-07-21 01:54:35,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df558cd11/2ccd55ebf3394a3498c55df06dec0913 [2020-07-21 01:54:35,890 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:54:35,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:54:35,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:54:35,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:54:35,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:54:35,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:54:35" (1/1) ... [2020-07-21 01:54:35,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8873d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:35, skipping insertion in model container [2020-07-21 01:54:35,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:54:35" (1/1) ... [2020-07-21 01:54:35,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:54:35,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:54:36,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:54:36,150 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:54:36,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:54:36,197 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:54:36,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:36 WrapperNode [2020-07-21 01:54:36,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:54:36,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:54:36,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:54:36,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:54:36,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:36" (1/1) ... [2020-07-21 01:54:36,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:36" (1/1) ... [2020-07-21 01:54:36,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:36" (1/1) ... [2020-07-21 01:54:36,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:36" (1/1) ... [2020-07-21 01:54:36,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:36" (1/1) ... [2020-07-21 01:54:36,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:36" (1/1) ... [2020-07-21 01:54:36,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:36" (1/1) ... [2020-07-21 01:54:36,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:54:36,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:54:36,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:54:36,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:54:36,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:54:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:54:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:54:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:54:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:54:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:54:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:54:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:54:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:54:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:54:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:54:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:54:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:54:36,599 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:54:36,600 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 01:54:36,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:54:36 BoogieIcfgContainer [2020-07-21 01:54:36,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:54:36,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:54:36,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:54:36,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:54:36,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:54:35" (1/3) ... [2020-07-21 01:54:36,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785a15a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:54:36, skipping insertion in model container [2020-07-21 01:54:36,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:54:36" (2/3) ... [2020-07-21 01:54:36,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785a15a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:54:36, skipping insertion in model container [2020-07-21 01:54:36,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:54:36" (3/3) ... [2020-07-21 01:54:36,614 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.c.i.v+cfa-reducer.c [2020-07-21 01:54:36,625 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:54:36,632 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:54:36,645 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:54:36,670 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:54:36,671 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:54:36,671 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:54:36,671 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:54:36,672 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:54:36,672 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:54:36,673 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:54:36,673 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:54:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 01:54:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 01:54:36,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:54:36,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:54:36,698 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:54:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:54:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1434042835, now seen corresponding path program 1 times [2020-07-21 01:54:36,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:54:36,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67299229] [2020-07-21 01:54:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:36,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:54:36,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:54:36,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:54:36,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:54:37,032 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:54:37,038 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:54:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:54:37,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:54:37,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67299229] [2020-07-21 01:54:37,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:54:37,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:54:37,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280152334] [2020-07-21 01:54:37,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:54:37,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:54:37,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:54:37,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:54:37,086 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-07-21 01:54:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:54:37,230 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 01:54:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:54:37,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-21 01:54:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:54:37,241 INFO L225 Difference]: With dead ends: 30 [2020-07-21 01:54:37,241 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 01:54:37,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:54:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 01:54:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 01:54:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 01:54:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 01:54:37,289 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-21 01:54:37,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:54:37,289 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 01:54:37,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:54:37,290 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 01:54:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:54:37,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:54:37,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:54:37,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:37,508 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:54:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:54:37,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1507594220, now seen corresponding path program 1 times [2020-07-21 01:54:37,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:54:37,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502010804] [2020-07-21 01:54:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:37,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:54:37,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:54:37,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 01:54:37,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:54:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:54:37,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:54:37,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:54:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:54:37,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502010804] [2020-07-21 01:54:37,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:54:37,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-21 01:54:37,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219317744] [2020-07-21 01:54:37,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 01:54:37,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:54:37,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 01:54:37,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:54:37,716 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2020-07-21 01:54:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:54:37,941 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-21 01:54:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 01:54:37,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-07-21 01:54:37,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:54:37,943 INFO L225 Difference]: With dead ends: 23 [2020-07-21 01:54:37,944 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 01:54:37,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:54:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 01:54:37,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 01:54:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 01:54:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 01:54:37,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-21 01:54:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:54:37,952 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 01:54:37,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 01:54:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 01:54:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:54:37,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:54:37,953 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:54:38,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:38,167 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:54:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:54:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2102853613, now seen corresponding path program 2 times [2020-07-21 01:54:38,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:54:38,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223911722] [2020-07-21 01:54:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:38,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:54:38,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:54:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 01:54:38,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:54:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:54:38,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:54:38,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:54:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:54:38,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223911722] [2020-07-21 01:54:38,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:54:38,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 01:54:38,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849554767] [2020-07-21 01:54:38,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 01:54:38,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:54:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 01:54:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-07-21 01:54:38,495 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 15 states. [2020-07-21 01:54:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:54:39,040 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 01:54:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 01:54:39,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2020-07-21 01:54:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:54:39,043 INFO L225 Difference]: With dead ends: 29 [2020-07-21 01:54:39,043 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 01:54:39,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-07-21 01:54:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 01:54:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 01:54:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 01:54:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-21 01:54:39,053 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-21 01:54:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:54:39,053 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-21 01:54:39,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 01:54:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-21 01:54:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:54:39,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:54:39,055 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:54:39,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:39,271 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:54:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:54:39,273 INFO L82 PathProgramCache]: Analyzing trace with hash 906772109, now seen corresponding path program 3 times [2020-07-21 01:54:39,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:54:39,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563648532] [2020-07-21 01:54:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:39,332 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:54:39,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:54:39,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-21 01:54:39,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:54:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:54:39,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:54:39,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:54:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:54:40,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563648532] [2020-07-21 01:54:40,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:54:40,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-07-21 01:54:40,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704918065] [2020-07-21 01:54:40,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 01:54:40,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:54:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 01:54:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2020-07-21 01:54:40,035 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 27 states. [2020-07-21 01:54:40,691 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-07-21 01:54:41,011 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-07-21 01:54:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:54:41,797 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 01:54:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 01:54:41,799 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 22 [2020-07-21 01:54:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:54:41,800 INFO L225 Difference]: With dead ends: 41 [2020-07-21 01:54:41,800 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 01:54:41,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=550, Invalid=1172, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 01:54:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 01:54:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 01:54:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 01:54:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-21 01:54:41,823 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-21 01:54:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:54:41,824 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-21 01:54:41,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 01:54:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-21 01:54:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 01:54:41,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:54:41,827 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:54:42,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:42,032 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:54:42,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:54:42,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1007922227, now seen corresponding path program 4 times [2020-07-21 01:54:42,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:54:42,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88431542] [2020-07-21 01:54:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:42,111 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:54:42,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:54:42,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-21 01:54:42,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:54:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:54:42,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:54:42,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:54:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:54:44,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88431542] [2020-07-21 01:54:44,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:54:44,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2020-07-21 01:54:44,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037682812] [2020-07-21 01:54:44,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-21 01:54:44,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:54:44,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-21 01:54:44,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2020-07-21 01:54:44,256 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 51 states. [2020-07-21 01:54:45,211 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 01:54:45,584 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 01:54:45,949 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-07-21 01:54:46,310 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 01:54:46,687 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 100 [2020-07-21 01:54:46,995 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 01:54:47,283 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 01:54:47,588 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 01:54:47,862 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 01:54:48,147 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 01:54:48,423 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 01:54:51,274 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 01:54:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:54:51,292 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-21 01:54:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-21 01:54:51,294 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 34 [2020-07-21 01:54:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:54:51,296 INFO L225 Difference]: With dead ends: 65 [2020-07-21 01:54:51,296 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 01:54:51,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1942, Invalid=4064, Unknown=0, NotChecked=0, Total=6006 [2020-07-21 01:54:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 01:54:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 01:54:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 01:54:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-21 01:54:51,316 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-21 01:54:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:54:51,316 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-21 01:54:51,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-21 01:54:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-21 01:54:51,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 01:54:51,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:54:51,318 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:54:51,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:51,535 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:54:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:54:51,535 INFO L82 PathProgramCache]: Analyzing trace with hash -765796787, now seen corresponding path program 5 times [2020-07-21 01:54:51,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:54:51,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500026544] [2020-07-21 01:54:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:51,650 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:54:51,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:54:51,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 195 conjunts are in the unsatisfiable core [2020-07-21 01:54:51,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:54:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:54:53,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:54:53,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:54:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:54:59,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500026544] [2020-07-21 01:54:59,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:54:59,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 99 [2020-07-21 01:54:59,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214292993] [2020-07-21 01:54:59,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-07-21 01:54:59,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:54:59,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-07-21 01:54:59,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2407, Invalid=7295, Unknown=0, NotChecked=0, Total=9702 [2020-07-21 01:54:59,713 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 99 states. [2020-07-21 01:55:03,115 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-21 01:55:04,512 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 01:55:05,548 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 194 [2020-07-21 01:55:06,908 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 01:55:07,916 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 196 [2020-07-21 01:55:09,183 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-21 01:55:10,418 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-07-21 01:55:11,616 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-21 01:55:12,847 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-21 01:55:14,029 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-21 01:55:15,186 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-21 01:55:16,347 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-21 01:55:17,443 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-21 01:55:18,542 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 01:55:19,619 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-21 01:55:20,647 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 01:55:21,665 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 01:55:22,652 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-21 01:55:23,629 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 01:55:24,557 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-21 01:55:25,504 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 01:55:26,430 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 01:55:27,310 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 01:55:28,161 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 01:55:29,031 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 01:55:29,843 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-21 01:55:30,629 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 01:55:31,394 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 01:55:32,141 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 01:55:32,888 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 01:55:33,587 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 01:55:34,325 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 01:55:34,977 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 01:55:35,611 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 01:55:36,210 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 01:55:36,771 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 01:55:37,321 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 01:55:37,866 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 01:55:43,516 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 01:55:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:55:43,535 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2020-07-21 01:55:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-21 01:55:43,537 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 58 [2020-07-21 01:55:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:55:43,539 INFO L225 Difference]: With dead ends: 113 [2020-07-21 01:55:43,540 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 01:55:43,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=7318, Invalid=15032, Unknown=0, NotChecked=0, Total=22350 [2020-07-21 01:55:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 01:55:43,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-21 01:55:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 01:55:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-21 01:55:43,583 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-21 01:55:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:55:43,584 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-21 01:55:43,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-07-21 01:55:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-21 01:55:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-21 01:55:43,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:55:43,589 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:55:43,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:55:43,791 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:55:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:55:43,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1152480077, now seen corresponding path program 6 times [2020-07-21 01:55:43,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:55:43,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875121154] [2020-07-21 01:55:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:55:44,046 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:55:44,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:55:44,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 387 conjunts are in the unsatisfiable core [2020-07-21 01:55:44,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:55:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:55:53,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:55:53,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:56:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:23,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875121154] [2020-07-21 01:56:23,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:56:23,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 195 [2020-07-21 01:56:23,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411641868] [2020-07-21 01:56:23,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 195 states [2020-07-21 01:56:23,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:23,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2020-07-21 01:56:23,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9415, Invalid=28415, Unknown=0, NotChecked=0, Total=37830 [2020-07-21 01:56:23,495 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 195 states. [2020-07-21 01:56:43,533 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 482 [2020-07-21 01:56:53,915 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 477 [2020-07-21 01:56:57,415 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 480 DAG size of output: 386 [2020-07-21 01:57:08,346 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 472 [2020-07-21 01:57:12,348 WARN L193 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 482 DAG size of output: 388 [2020-07-21 01:57:24,868 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 467 [2020-07-21 01:57:38,522 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification that was a NOOP. DAG size: 462 [2020-07-21 01:57:53,740 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-21 01:58:12,130 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 452 [2020-07-21 01:58:30,946 WARN L193 SmtUtils]: Spent 3.00 s on a formula simplification that was a NOOP. DAG size: 447 [2020-07-21 01:58:50,762 WARN L193 SmtUtils]: Spent 3.09 s on a formula simplification that was a NOOP. DAG size: 442 [2020-07-21 01:59:11,711 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification that was a NOOP. DAG size: 437 [2020-07-21 01:59:31,439 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification that was a NOOP. DAG size: 432 [2020-07-21 01:59:52,646 WARN L193 SmtUtils]: Spent 3.10 s on a formula simplification that was a NOOP. DAG size: 427 [2020-07-21 02:00:14,873 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification that was a NOOP. DAG size: 422 [2020-07-21 02:00:38,549 WARN L193 SmtUtils]: Spent 3.66 s on a formula simplification that was a NOOP. DAG size: 417 [2020-07-21 02:00:59,821 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 412 [2020-07-21 02:01:17,545 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 407 [2020-07-21 02:01:36,164 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 402 [2020-07-21 02:01:55,545 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-21 02:02:14,975 WARN L193 SmtUtils]: Spent 2.97 s on a formula simplification that was a NOOP. DAG size: 392 [2020-07-21 02:02:34,644 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification that was a NOOP. DAG size: 387 [2020-07-21 02:02:54,961 WARN L193 SmtUtils]: Spent 3.03 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-21 02:03:15,584 WARN L193 SmtUtils]: Spent 3.09 s on a formula simplification that was a NOOP. DAG size: 377 [2020-07-21 02:03:36,298 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 372 [2020-07-21 02:03:57,301 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification that was a NOOP. DAG size: 367 [2020-07-21 02:04:18,664 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification that was a NOOP. DAG size: 362 [2020-07-21 02:04:39,716 WARN L193 SmtUtils]: Spent 3.14 s on a formula simplification that was a NOOP. DAG size: 357 [2020-07-21 02:05:01,254 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-21 02:05:23,142 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-21 02:05:45,353 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification that was a NOOP. DAG size: 342 [2020-07-21 02:06:07,722 WARN L193 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 337 [2020-07-21 02:06:30,471 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification that was a NOOP. DAG size: 332 [2020-07-21 02:06:53,490 WARN L193 SmtUtils]: Spent 3.09 s on a formula simplification that was a NOOP. DAG size: 327 [2020-07-21 02:07:17,175 WARN L193 SmtUtils]: Spent 3.07 s on a formula simplification that was a NOOP. DAG size: 322 [2020-07-21 02:07:41,532 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification that was a NOOP. DAG size: 317 [2020-07-21 02:08:06,147 WARN L193 SmtUtils]: Spent 3.43 s on a formula simplification that was a NOOP. DAG size: 312 [2020-07-21 02:08:30,527 WARN L193 SmtUtils]: Spent 3.39 s on a formula simplification that was a NOOP. DAG size: 307 [2020-07-21 02:08:54,968 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification that was a NOOP. DAG size: 302