/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:05:16,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:05:16,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:05:16,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:05:16,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:05:16,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:05:16,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:05:16,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:05:16,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:05:16,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:05:16,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:05:16,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:05:16,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:05:16,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:05:16,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:05:16,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:05:16,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:05:16,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:05:16,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:05:16,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:05:16,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:05:16,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:05:16,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:05:16,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:05:16,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:05:16,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:05:16,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:05:16,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:05:16,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:05:16,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:05:16,549 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:05:16,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:05:16,550 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:05:16,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:05:16,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:05:16,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:05:16,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:05:16,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:05:16,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:05:16,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:05:16,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:05:16,551 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:05:16,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:05:16,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:05:16,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:05:16,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:05:16,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:05:16,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:05:16,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:05:16,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:05:16,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:05:16,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:05:16,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:16,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:05:16,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:05:16,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:05:16,919 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:05:16,951 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:05:16,956 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:05:16,961 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:05:16,961 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:05:16,962 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_15-1.c [2020-07-21 22:05:17,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28e56bdc9/f82f66264e5b4b909ffbaee351fd11ff/FLAGecb6185b2 [2020-07-21 22:05:17,661 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:05:17,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_15-1.c [2020-07-21 22:05:17,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28e56bdc9/f82f66264e5b4b909ffbaee351fd11ff/FLAGecb6185b2 [2020-07-21 22:05:17,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28e56bdc9/f82f66264e5b4b909ffbaee351fd11ff [2020-07-21 22:05:17,973 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:05:17,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:05:17,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:05:17,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:05:17,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:05:17,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:05:17" (1/1) ... [2020-07-21 22:05:17,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30356062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:05:17, skipping insertion in model container [2020-07-21 22:05:17,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:05:17" (1/1) ... [2020-07-21 22:05:18,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:05:18,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:05:18,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:05:18,306 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:05:18,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:05:18,340 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:05:18,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:05:18 WrapperNode [2020-07-21 22:05:18,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:05:18,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:05:18,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:05:18,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:05:18,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:05:18" (1/1) ... [2020-07-21 22:05:18,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:05:18" (1/1) ... [2020-07-21 22:05:18,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:05:18" (1/1) ... [2020-07-21 22:05:18,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:05:18" (1/1) ... [2020-07-21 22:05:18,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:05:18" (1/1) ... [2020-07-21 22:05:18,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:05:18" (1/1) ... [2020-07-21 22:05:18,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:05:18" (1/1) ... [2020-07-21 22:05:18,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:05:18,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:05:18,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:05:18,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:05:18,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:05:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:05:18,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:05:18,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:05:18,574 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 22:05:18,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:05:18,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:05:18,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:05:18,574 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 22:05:18,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:05:18,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:05:18,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:05:18,853 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:05:18,857 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:05:18,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:05:18 BoogieIcfgContainer [2020-07-21 22:05:18,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:05:18,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:05:18,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:05:18,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:05:18,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:05:17" (1/3) ... [2020-07-21 22:05:18,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dd6521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:05:18, skipping insertion in model container [2020-07-21 22:05:18,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:05:18" (2/3) ... [2020-07-21 22:05:18,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dd6521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:05:18, skipping insertion in model container [2020-07-21 22:05:18,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:05:18" (3/3) ... [2020-07-21 22:05:18,912 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_15-1.c [2020-07-21 22:05:18,952 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:05:18,979 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:05:19,024 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:05:19,065 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:05:19,065 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:05:19,066 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:05:19,066 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:05:19,066 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:05:19,066 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:05:19,066 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:05:19,067 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:05:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 22:05:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:05:19,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:19,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:19,109 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:19,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:19,118 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 22:05:19,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:19,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586446972] [2020-07-21 22:05:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:19,220 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:05:19,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:19,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:05:19,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:05:19,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:05:19,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586446972] [2020-07-21 22:05:19,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:05:19,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:05:19,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200371355] [2020-07-21 22:05:19,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:05:19,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:19,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:05:19,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:05:19,390 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 22:05:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:19,547 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 22:05:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:05:19,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:05:19,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:19,566 INFO L225 Difference]: With dead ends: 35 [2020-07-21 22:05:19,567 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 22:05:19,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:05:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 22:05:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 22:05:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 22:05:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 22:05:19,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 22:05:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:19,643 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 22:05:19,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:05:19,644 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 22:05:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:05:19,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:19,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:19,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:19,863 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:19,864 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 22:05:19,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:19,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251965805] [2020-07-21 22:05:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:19,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:05:19,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:19,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:05:19,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:05:19,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:05:19,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251965805] [2020-07-21 22:05:19,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:05:19,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:05:19,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415297311] [2020-07-21 22:05:19,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:05:19,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:19,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:05:19,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:05:19,968 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 22:05:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:20,091 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 22:05:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:05:20,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:05:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:20,095 INFO L225 Difference]: With dead ends: 27 [2020-07-21 22:05:20,095 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 22:05:20,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:05:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 22:05:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 22:05:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 22:05:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 22:05:20,109 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 22:05:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:20,109 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 22:05:20,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:05:20,110 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 22:05:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:05:20,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:20,113 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:20,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:20,330 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:20,332 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 22:05:20,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:20,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283460154] [2020-07-21 22:05:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:20,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:05:20,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:20,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:05:20,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:05:20,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:20,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 22:05:20,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283460154] [2020-07-21 22:05:20,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:20,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 22:05:20,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446738224] [2020-07-21 22:05:20,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:05:20,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:20,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:05:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:05:20,852 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 22:05:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:21,047 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 22:05:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:05:21,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 22:05:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:21,050 INFO L225 Difference]: With dead ends: 32 [2020-07-21 22:05:21,051 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 22:05:21,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:05:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 22:05:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 22:05:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 22:05:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 22:05:21,068 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 22:05:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:21,068 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 22:05:21,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:05:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 22:05:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:05:21,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:21,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:21,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:21,274 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:21,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:21,275 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 22:05:21,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:21,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956697472] [2020-07-21 22:05:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:21,323 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:05:21,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:21,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:05:21,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:05:21,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:21,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 22:05:21,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956697472] [2020-07-21 22:05:21,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:21,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 22:05:21,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862802515] [2020-07-21 22:05:21,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:05:21,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:21,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:05:21,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:05:21,697 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 22:05:21,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:21,894 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 22:05:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:05:21,895 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 22:05:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:21,901 INFO L225 Difference]: With dead ends: 37 [2020-07-21 22:05:21,902 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 22:05:21,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:05:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 22:05:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 22:05:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 22:05:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 22:05:21,931 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 22:05:21,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:21,932 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 22:05:21,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:05:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 22:05:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:05:21,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:21,938 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:22,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:22,140 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:22,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 22:05:22,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:22,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991527232] [2020-07-21 22:05:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:22,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:05:22,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:22,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:05:22,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 22:05:22,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:22,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:22,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:22,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:22,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 22:05:22,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991527232] [2020-07-21 22:05:22,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:22,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 22:05:22,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440303675] [2020-07-21 22:05:22,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:05:22,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:22,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:05:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:05:22,709 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 22:05:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:22,936 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 22:05:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:05:22,937 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 22:05:22,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:22,939 INFO L225 Difference]: With dead ends: 42 [2020-07-21 22:05:22,940 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 22:05:22,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:05:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 22:05:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 22:05:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 22:05:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 22:05:22,956 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 22:05:22,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:22,956 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 22:05:22,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:05:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 22:05:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 22:05:22,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:22,959 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:23,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:23,161 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:23,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 22:05:23,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:23,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66703364] [2020-07-21 22:05:23,164 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:23,199 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:05:23,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:23,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:05:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 22:05:23,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:23,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:23,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:23,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 22:05:23,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66703364] [2020-07-21 22:05:23,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:23,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 22:05:23,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225513713] [2020-07-21 22:05:23,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:05:23,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:23,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:05:23,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:05:23,648 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 22:05:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:23,845 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 22:05:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:05:23,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 22:05:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:23,854 INFO L225 Difference]: With dead ends: 47 [2020-07-21 22:05:23,855 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 22:05:23,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:05:23,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 22:05:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 22:05:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 22:05:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 22:05:23,890 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 22:05:23,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:23,892 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 22:05:23,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:05:23,893 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 22:05:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 22:05:23,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:23,902 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:24,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:24,114 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 22:05:24,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:24,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714366619] [2020-07-21 22:05:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:24,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:05:24,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:24,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:05:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 22:05:24,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:24,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:24,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:24,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:24,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:24,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 22:05:24,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714366619] [2020-07-21 22:05:24,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:24,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 22:05:24,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019573961] [2020-07-21 22:05:24,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:05:24,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:24,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:05:24,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:05:24,997 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 22:05:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:25,258 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 22:05:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:05:25,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 22:05:25,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:25,262 INFO L225 Difference]: With dead ends: 52 [2020-07-21 22:05:25,263 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 22:05:25,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:05:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 22:05:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 22:05:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 22:05:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 22:05:25,279 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 22:05:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:25,280 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 22:05:25,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:05:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 22:05:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 22:05:25,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:25,283 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:25,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:25,493 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:25,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 22:05:25,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:25,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658466221] [2020-07-21 22:05:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:25,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:05:25,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:25,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:05:25,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-21 22:05:25,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:26,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:26,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:26,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:26,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-21 22:05:26,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658466221] [2020-07-21 22:05:26,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:26,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 22:05:26,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009743958] [2020-07-21 22:05:26,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:05:26,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:26,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:05:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:05:26,457 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 22:05:26,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:26,622 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 22:05:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:05:26,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-21 22:05:26,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:26,626 INFO L225 Difference]: With dead ends: 57 [2020-07-21 22:05:26,627 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 22:05:26,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:05:26,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 22:05:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 22:05:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 22:05:26,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 22:05:26,646 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 22:05:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:26,647 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 22:05:26,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:05:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 22:05:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 22:05:26,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:26,651 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:26,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:26,865 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:26,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 22:05:26,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:26,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818212790] [2020-07-21 22:05:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:26,927 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:05:26,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:26,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:05:26,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 22:05:27,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:27,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:27,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:27,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:28,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:28,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 22:05:28,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818212790] [2020-07-21 22:05:28,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:28,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 22:05:28,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837568488] [2020-07-21 22:05:28,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:05:28,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:28,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:05:28,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:05:28,223 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 22:05:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:28,538 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 22:05:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:05:28,539 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-21 22:05:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:28,541 INFO L225 Difference]: With dead ends: 62 [2020-07-21 22:05:28,541 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 22:05:28,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:05:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 22:05:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 22:05:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 22:05:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 22:05:28,558 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 22:05:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:28,559 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 22:05:28,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:05:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 22:05:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 22:05:28,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:28,563 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:28,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:28,778 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:28,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 22:05:28,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:28,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655656004] [2020-07-21 22:05:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:28,854 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:05:28,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:28,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:05:28,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-21 22:05:28,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:29,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-21 22:05:30,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655656004] [2020-07-21 22:05:30,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:30,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 22:05:30,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611133613] [2020-07-21 22:05:30,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:05:30,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:30,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:05:30,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:05:30,287 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 22:05:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:30,495 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 22:05:30,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:05:30,496 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-21 22:05:30,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:30,499 INFO L225 Difference]: With dead ends: 67 [2020-07-21 22:05:30,500 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 22:05:30,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:05:30,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 22:05:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 22:05:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 22:05:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 22:05:30,516 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-21 22:05:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:30,517 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 22:05:30,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:05:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 22:05:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 22:05:30,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:30,523 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:30,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:30,737 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:30,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-21 22:05:30,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:30,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061765951] [2020-07-21 22:05:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:30,825 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:05:30,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:30,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:05:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 22:05:30,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:32,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:32,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:32,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:32,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:32,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:32,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 22:05:33,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061765951] [2020-07-21 22:05:33,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:33,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 22:05:33,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875422532] [2020-07-21 22:05:33,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:05:33,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:33,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:05:33,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:05:33,088 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 22:05:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:33,358 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 22:05:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:05:33,358 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 22:05:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:33,362 INFO L225 Difference]: With dead ends: 72 [2020-07-21 22:05:33,363 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 22:05:33,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:05:33,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 22:05:33,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 22:05:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 22:05:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 22:05:33,379 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 22:05:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:33,380 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 22:05:33,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:05:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 22:05:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 22:05:33,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:33,385 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:33,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:33,601 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:33,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1006419304, now seen corresponding path program 5 times [2020-07-21 22:05:33,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:33,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295216187] [2020-07-21 22:05:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:33,699 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:05:33,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:33,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:05:33,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-21 22:05:33,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:35,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:35,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:36,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:36,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:36,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:36,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-21 22:05:36,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295216187] [2020-07-21 22:05:36,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:36,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 22:05:36,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502548201] [2020-07-21 22:05:36,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:05:36,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:36,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:05:36,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:05:36,284 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 22:05:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:36,560 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 22:05:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:05:36,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-21 22:05:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:36,571 INFO L225 Difference]: With dead ends: 77 [2020-07-21 22:05:36,571 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 22:05:36,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:05:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 22:05:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 22:05:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 22:05:36,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 22:05:36,615 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-21 22:05:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:36,616 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 22:05:36,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:05:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 22:05:36,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 22:05:36,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:36,632 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:36,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:36,847 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:36,847 INFO L82 PathProgramCache]: Analyzing trace with hash 785285043, now seen corresponding path program 6 times [2020-07-21 22:05:36,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:36,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132332826] [2020-07-21 22:05:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:37,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:05:37,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:37,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:05:37,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2126 refuted. 0 times theorem prover too weak. 12702 trivial. 0 not checked. [2020-07-21 22:05:37,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:39,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:40,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:40,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:40,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:40,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:40,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:40,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:40,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2177 refuted. 0 times theorem prover too weak. 12651 trivial. 0 not checked. [2020-07-21 22:05:41,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132332826] [2020-07-21 22:05:41,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:41,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 22:05:41,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417036683] [2020-07-21 22:05:41,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:05:41,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:41,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:05:41,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:05:41,181 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 22:05:41,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:41,732 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 22:05:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:05:41,734 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 507 [2020-07-21 22:05:41,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:41,744 INFO L225 Difference]: With dead ends: 82 [2020-07-21 22:05:41,744 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 22:05:41,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 983 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:05:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 22:05:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 22:05:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 22:05:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 22:05:41,788 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 507 [2020-07-21 22:05:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:41,792 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 22:05:41,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:05:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 22:05:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 22:05:41,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:41,798 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:42,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:42,014 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:42,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:42,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-21 22:05:42,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:42,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634664940] [2020-07-21 22:05:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:42,166 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:05:42,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:42,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:05:42,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1918 refuted. 0 times theorem prover too weak. 9431 trivial. 0 not checked. [2020-07-21 22:05:42,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:44,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:44,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:44,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:45,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:45,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:45,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:45,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:45,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:45,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1975 refuted. 0 times theorem prover too weak. 9374 trivial. 0 not checked. [2020-07-21 22:05:45,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634664940] [2020-07-21 22:05:45,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:45,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 22:05:45,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777735738] [2020-07-21 22:05:45,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:05:45,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:45,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:05:45,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:05:45,804 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 22:05:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:46,123 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 22:05:46,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:05:46,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-21 22:05:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:46,129 INFO L225 Difference]: With dead ends: 87 [2020-07-21 22:05:46,129 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 22:05:46,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:05:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 22:05:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 22:05:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 22:05:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 22:05:46,169 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 450 [2020-07-21 22:05:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:46,170 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 22:05:46,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:05:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 22:05:46,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2020-07-21 22:05:46,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:46,184 INFO L422 BasicCegarLoop]: trace histogram [163, 163, 82, 81, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:46,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:46,398 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:46,400 INFO L82 PathProgramCache]: Analyzing trace with hash 40336450, now seen corresponding path program 7 times [2020-07-21 22:05:46,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:46,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057768801] [2020-07-21 22:05:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:46,705 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:05:46,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:46,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:05:46,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5632 refuted. 0 times theorem prover too weak. 62583 trivial. 0 not checked. [2020-07-21 22:05:47,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:51,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:51,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:52,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:53,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:53,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:53,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:53,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:53,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:53,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:54,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:54,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:54,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5702 refuted. 0 times theorem prover too weak. 62513 trivial. 0 not checked. [2020-07-21 22:05:54,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057768801] [2020-07-21 22:05:54,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:54,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 22:05:54,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205578770] [2020-07-21 22:05:54,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:05:54,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:05:54,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:05:54,667 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 22:05:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:55,578 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 22:05:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:05:55,579 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1066 [2020-07-21 22:05:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:55,585 INFO L225 Difference]: With dead ends: 92 [2020-07-21 22:05:55,585 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 22:05:55,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2140 GetRequests, 2097 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:05:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 22:05:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 22:05:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 22:05:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 22:05:55,603 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1066 [2020-07-21 22:05:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:55,605 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 22:05:55,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:05:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 22:05:55,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2020-07-21 22:05:55,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:55,613 INFO L422 BasicCegarLoop]: trace histogram [101, 101, 84, 50, 50, 50, 50, 50, 50, 50, 34, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:55,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:55,827 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:55,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:55,827 INFO L82 PathProgramCache]: Analyzing trace with hash 822363973, now seen corresponding path program 7 times [2020-07-21 22:05:55,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:55,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001153038] [2020-07-21 22:05:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:56,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:05:56,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:56,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:05:56,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 28586 backedges. 537 proven. 3626 refuted. 0 times theorem prover too weak. 24423 trivial. 0 not checked. [2020-07-21 22:05:56,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:59,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:59,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:00,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:00,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:00,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:01,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:01,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:01,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:01,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:01,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 28586 backedges. 537 proven. 3703 refuted. 0 times theorem prover too weak. 24346 trivial. 0 not checked. [2020-07-21 22:06:02,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001153038] [2020-07-21 22:06:02,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:06:02,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 22:06:02,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272432249] [2020-07-21 22:06:02,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:06:02,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:06:02,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:06:02,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:06:02,164 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 21 states. [2020-07-21 22:06:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:06:02,924 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 22:06:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:06:02,925 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 697 [2020-07-21 22:06:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:06:02,932 INFO L225 Difference]: With dead ends: 97 [2020-07-21 22:06:02,933 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 22:06:02,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1401 GetRequests, 1358 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:06:02,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 22:06:02,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 22:06:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 22:06:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 22:06:02,961 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 697 [2020-07-21 22:06:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:06:02,963 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 22:06:02,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:06:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 22:06:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1951 [2020-07-21 22:06:03,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:06:03,011 INFO L422 BasicCegarLoop]: trace histogram [299, 299, 150, 149, 149, 149, 149, 149, 149, 149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:06:03,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:03,227 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:06:03,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:06:03,228 INFO L82 PathProgramCache]: Analyzing trace with hash 395569872, now seen corresponding path program 8 times [2020-07-21 22:06:03,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:06:03,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950807103] [2020-07-21 22:06:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:03,646 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:06:03,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:06:03,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:06:03,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:06:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1911 proven. 11715 refuted. 0 times theorem prover too weak. 219708 trivial. 0 not checked. [2020-07-21 22:06:05,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:06:11,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:14,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:16,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:16,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:16,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:17,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:17,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:17,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:17,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:17,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:17,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:17,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1911 proven. 11807 refuted. 0 times theorem prover too weak. 219616 trivial. 0 not checked. [2020-07-21 22:06:19,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950807103] [2020-07-21 22:06:19,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:06:19,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 22:06:19,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591660757] [2020-07-21 22:06:19,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:06:19,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:06:19,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:06:19,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:06:19,142 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 23 states. [2020-07-21 22:06:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:06:19,720 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 22:06:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:06:19,722 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1950 [2020-07-21 22:06:19,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:06:19,731 INFO L225 Difference]: With dead ends: 102 [2020-07-21 22:06:19,732 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 22:06:19,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3909 GetRequests, 3861 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:06:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 22:06:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 22:06:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 22:06:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 22:06:19,758 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1950 [2020-07-21 22:06:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:06:19,762 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 22:06:19,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:06:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 22:06:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1354 [2020-07-21 22:06:19,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:06:19,789 INFO L422 BasicCegarLoop]: trace histogram [197, 197, 164, 98, 98, 98, 98, 98, 98, 98, 66, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:06:20,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:20,005 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:06:20,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:06:20,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1956381947, now seen corresponding path program 8 times [2020-07-21 22:06:20,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:06:20,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578203244] [2020-07-21 22:06:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:20,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:06:20,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:06:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:06:20,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:06:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 109602 backedges. 1201 proven. 8306 refuted. 0 times theorem prover too weak. 100095 trivial. 0 not checked. [2020-07-21 22:06:21,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:06:26,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:28,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:28,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:30,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:30,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:31,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:31,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:31,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:31,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:31,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:31,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 109602 backedges. 1201 proven. 8406 refuted. 0 times theorem prover too weak. 99995 trivial. 0 not checked. [2020-07-21 22:06:32,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578203244] [2020-07-21 22:06:32,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:06:32,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 22:06:32,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772461265] [2020-07-21 22:06:32,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:06:32,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:06:32,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:06:32,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:06:32,604 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 23 states. [2020-07-21 22:06:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:06:33,366 INFO L93 Difference]: Finished difference Result 107 states and 432 transitions. [2020-07-21 22:06:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:06:33,367 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1353 [2020-07-21 22:06:33,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:06:33,375 INFO L225 Difference]: With dead ends: 107 [2020-07-21 22:06:33,375 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 22:06:33,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2714 GetRequests, 2666 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:06:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 22:06:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-07-21 22:06:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 22:06:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 22:06:33,402 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1353 [2020-07-21 22:06:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:06:33,405 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 22:06:33,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:06:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 22:06:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2731 [2020-07-21 22:06:33,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:06:33,493 INFO L422 BasicCegarLoop]: trace histogram [419, 419, 210, 209, 209, 209, 209, 209, 209, 209, 209, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:06:33,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:33,705 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:06:33,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:06:33,707 INFO L82 PathProgramCache]: Analyzing trace with hash 221762484, now seen corresponding path program 9 times [2020-07-21 22:06:33,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:06:33,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753509647] [2020-07-21 22:06:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:34,294 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:06:34,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:06:34,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1520 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:06:34,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:06:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 458964 backedges. 2784 proven. 18684 refuted. 0 times theorem prover too weak. 437496 trivial. 0 not checked. [2020-07-21 22:06:37,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:06:46,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:52,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:55,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:56,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:56,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:57,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:57,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:58,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:58,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:58,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:58,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:58,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 458964 backedges. 2784 proven. 18801 refuted. 0 times theorem prover too weak. 437379 trivial. 0 not checked. [2020-07-21 22:07:01,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753509647] [2020-07-21 22:07:01,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:07:01,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 22:07:01,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676115196] [2020-07-21 22:07:01,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:07:01,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:07:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:07:01,987 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 25 states. [2020-07-21 22:07:03,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:03,215 INFO L93 Difference]: Finished difference Result 112 states and 474 transitions. [2020-07-21 22:07:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:07:03,219 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 2730 [2020-07-21 22:07:03,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:03,228 INFO L225 Difference]: With dead ends: 112 [2020-07-21 22:07:03,228 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 22:07:03,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5470 GetRequests, 5417 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 22:07:03,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 22:07:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-07-21 22:07:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 22:07:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 22:07:03,251 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2730 [2020-07-21 22:07:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:03,254 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 22:07:03,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:07:03,254 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 22:07:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2865 [2020-07-21 22:07:03,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:03,327 INFO L422 BasicCegarLoop]: trace histogram [419, 419, 343, 209, 209, 209, 209, 209, 209, 209, 134, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:07:03,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:03,528 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:03,530 INFO L82 PathProgramCache]: Analyzing trace with hash 565204626, now seen corresponding path program 9 times [2020-07-21 22:07:03,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:03,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453320437] [2020-07-21 22:07:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:04,202 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:07:04,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:04,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:07:04,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 495881 backedges. 2784 proven. 20214 refuted. 0 times theorem prover too weak. 472883 trivial. 0 not checked. [2020-07-21 22:07:07,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:18,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:25,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:28,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:28,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:30,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:31,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:31,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:31,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:32,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:32,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:32,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:32,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 495881 backedges. 2784 proven. 20340 refuted. 0 times theorem prover too weak. 472757 trivial. 0 not checked. [2020-07-21 22:07:35,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453320437] [2020-07-21 22:07:35,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:07:35,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 22:07:35,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156661294] [2020-07-21 22:07:35,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:07:35,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:07:35,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:07:35,851 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 25 states. [2020-07-21 22:07:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:37,084 INFO L93 Difference]: Finished difference Result 117 states and 518 transitions. [2020-07-21 22:07:37,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:07:37,086 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 2864 [2020-07-21 22:07:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:37,095 INFO L225 Difference]: With dead ends: 117 [2020-07-21 22:07:37,096 INFO L226 Difference]: Without dead ends: 113 [2020-07-21 22:07:37,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5737 GetRequests, 5684 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 22:07:37,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-21 22:07:37,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-07-21 22:07:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 22:07:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 22:07:37,125 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2864 [2020-07-21 22:07:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:37,127 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 22:07:37,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:07:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 22:07:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4434 [2020-07-21 22:07:37,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:37,347 INFO L422 BasicCegarLoop]: trace histogram [681, 681, 341, 340, 340, 340, 340, 340, 340, 340, 340, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:07:37,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:37,548 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:37,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1507680547, now seen corresponding path program 10 times [2020-07-21 22:07:37,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:37,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832270637] [2020-07-21 22:07:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:38,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:07:38,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:38,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 2470 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 22:07:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1214310 backedges. 4455 proven. 34400 refuted. 0 times theorem prover too weak. 1175455 trivial. 0 not checked. [2020-07-21 22:07:48,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:08:08,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:08,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:15,414 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:08:19,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:23,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:26,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:27,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:28,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:28,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:29,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:29,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:29,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:29,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:08:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1214310 backedges. 4455 proven. 34545 refuted. 0 times theorem prover too weak. 1175310 trivial. 0 not checked. [2020-07-21 22:08:38,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832270637] [2020-07-21 22:08:38,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:08:38,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 22:08:38,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513140125] [2020-07-21 22:08:38,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 22:08:38,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:08:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 22:08:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:08:38,847 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 27 states. [2020-07-21 22:08:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:08:40,815 INFO L93 Difference]: Finished difference Result 122 states and 564 transitions. [2020-07-21 22:08:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:08:40,817 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 4433 [2020-07-21 22:08:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:08:40,829 INFO L225 Difference]: With dead ends: 122 [2020-07-21 22:08:40,829 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 22:08:40,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8877 GetRequests, 8819 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 22:08:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 22:08:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2020-07-21 22:08:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 22:08:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-21 22:08:40,868 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 4433 [2020-07-21 22:08:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:08:40,873 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-21 22:08:40,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 22:08:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-21 22:08:41,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7025 [2020-07-21 22:08:41,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:08:41,527 INFO L422 BasicCegarLoop]: trace histogram [1033, 1033, 819, 516, 516, 516, 516, 516, 516, 516, 303, 214, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:08:41,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:41,744 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:08:41,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:08:41,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1280866185, now seen corresponding path program 10 times [2020-07-21 22:08:41,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:08:41,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029170620] [2020-07-21 22:08:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:08:43,164 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:08:43,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:08:43,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 3897 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 22:08:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:09:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2998563 backedges. 6917 proven. 56182 refuted. 0 times theorem prover too weak. 2935464 trivial. 0 not checked. [2020-07-21 22:09:04,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:09:13,230 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:09:13,332 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:09:13,444 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:09:13,555 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:09:13,664 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:09:45,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:09:53,355 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:10:04,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:04,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:11,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:11,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:16,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:16,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:19,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:19,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:21,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:21,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:22,101 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:10:22,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:22,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:22,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:22,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:22,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:23,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:10:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2998563 backedges. 6917 proven. 56337 refuted. 0 times theorem prover too weak. 2935309 trivial. 0 not checked. [2020-07-21 22:10:44,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029170620] [2020-07-21 22:10:44,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:10:44,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 22:10:44,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721094001] [2020-07-21 22:10:44,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 22:10:44,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:10:44,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 22:10:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:10:44,891 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 27 states. [2020-07-21 22:10:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:10:46,887 INFO L93 Difference]: Finished difference Result 127 states and 612 transitions. [2020-07-21 22:10:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:10:46,891 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 7024 [2020-07-21 22:10:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:10:46,902 INFO L225 Difference]: With dead ends: 127 [2020-07-21 22:10:46,903 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 22:10:46,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14058 GetRequests, 14000 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 22:10:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 22:10:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2020-07-21 22:10:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 22:10:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-21 22:10:46,937 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 7024 [2020-07-21 22:10:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:10:46,943 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-21 22:10:46,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 22:10:46,944 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-21 22:10:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6306 [2020-07-21 22:10:47,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:10:47,257 INFO L422 BasicCegarLoop]: trace histogram [969, 969, 485, 484, 484, 484, 484, 484, 484, 484, 484, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:10:47,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:10:47,458 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:10:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:10:47,461 INFO L82 PathProgramCache]: Analyzing trace with hash -428638537, now seen corresponding path program 11 times [2020-07-21 22:10:47,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:10:47,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644405951] [2020-07-21 22:10:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:10:48,899 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:10:48,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:10:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 3512 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:10:49,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:11:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2460414 backedges. 6256 proven. 54508 refuted. 0 times theorem prover too weak. 2399650 trivial. 0 not checked. [2020-07-21 22:11:07,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:11:11,699 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:11:13,033 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:11:13,140 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:11:13,261 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:11:13,377 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:11:17,294 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:11:17,414 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:11:17,540 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:11:17,664 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:11:17,792 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:11:17,912 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:11:18,029 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:11:40,346 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:11:52,516 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:11:52,636 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:11:52,757 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:11:52,876 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:11:53,006 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:11:53,121 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:11:53,327 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:11:53,429 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:11:54,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:06,605 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:12:07,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:13,745 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:12:20,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:20,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:25,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:25,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:29,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:31,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:31,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:32,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:32,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:33,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:34,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:34,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:34,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:34,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:12:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2460414 backedges. 6256 proven. 54684 refuted. 0 times theorem prover too weak. 2399474 trivial. 0 not checked. [2020-07-21 22:12:54,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644405951] [2020-07-21 22:12:54,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:12:54,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 22:12:54,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360389685] [2020-07-21 22:12:54,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 22:12:54,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:12:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 22:12:54,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:12:54,153 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 29 states. [2020-07-21 22:12:57,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:12:57,232 INFO L93 Difference]: Finished difference Result 132 states and 662 transitions. [2020-07-21 22:12:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:12:57,236 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 6305 [2020-07-21 22:12:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:12:57,247 INFO L225 Difference]: With dead ends: 132 [2020-07-21 22:12:57,247 INFO L226 Difference]: Without dead ends: 128 [2020-07-21 22:12:57,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12622 GetRequests, 12559 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 22:12:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-21 22:12:57,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2020-07-21 22:12:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 22:12:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-21 22:12:57,285 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 6305 [2020-07-21 22:12:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:12:57,290 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-21 22:12:57,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 22:12:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-21 22:12:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11537 [2020-07-21 22:12:58,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:12:58,713 INFO L422 BasicCegarLoop]: trace histogram [1679, 1679, 1455, 839, 839, 839, 839, 839, 839, 839, 616, 224, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:12:58,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:12:58,915 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:12:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:12:58,919 INFO L82 PathProgramCache]: Analyzing trace with hash 917175142, now seen corresponding path program 11 times [2020-07-21 22:12:58,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:12:58,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92028245] [2020-07-21 22:12:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:13:01,248 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:13:01,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:13:01,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 6395 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:13:01,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:14:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8098673 backedges. 10726 proven. 103331 refuted. 0 times theorem prover too weak. 7984616 trivial. 0 not checked. [2020-07-21 22:14:01,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:14:05,665 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:14:07,958 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:14:08,064 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:14:08,182 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:14:08,306 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:14:12,390 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:14:12,516 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:14:12,648 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:14:12,785 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:14:21,599 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:14:21,759 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:14:21,928 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:14:22,092 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:14:22,257 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:14:22,407 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:14:22,561 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:14:22,702 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:14:22,830 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:14:22,955 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 22:14:23,073 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:14:23,185 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:14:23,289 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:15:07,937 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:15:50,612 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:15:50,725 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:15:50,835 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:15:51,913 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:15:52,024 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:15:52,141 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:15:52,249 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:15:54,748 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:15:54,858 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:15:54,981 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:15:55,101 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:15:59,398 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:15:59,516 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:15:59,633 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:15:59,767 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:15:59,898 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:16:00,009 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:16:00,114 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:16:00,229 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:16:01,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:01,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:39,388 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:16:39,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:53,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:53,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:03,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:03,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:06,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,235 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:17:07,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:08,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:08,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:08,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:08,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:08,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8098673 backedges. 10726 proven. 103518 refuted. 0 times theorem prover too weak. 7984429 trivial. 0 not checked. [2020-07-21 22:17:52,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92028245] [2020-07-21 22:17:52,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:52,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 22:17:52,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463661301] [2020-07-21 22:17:52,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 22:17:52,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:52,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 22:17:52,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:17:52,683 INFO L87 Difference]: Start difference. First operand 76 states and 234 transitions. Second operand 29 states. [2020-07-21 22:17:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:54,398 INFO L93 Difference]: Finished difference Result 137 states and 714 transitions. [2020-07-21 22:17:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:17:54,400 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 11536 [2020-07-21 22:17:54,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:54,414 INFO L225 Difference]: With dead ends: 137 [2020-07-21 22:17:54,414 INFO L226 Difference]: Without dead ends: 133 [2020-07-21 22:17:54,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23083 GetRequests, 23020 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 22:17:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-21 22:17:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 76. [2020-07-21 22:17:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 22:17:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-21 22:17:54,442 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 11536 [2020-07-21 22:17:54,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:54,448 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-21 22:17:54,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 22:17:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-21 22:17:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12481 [2020-07-21 22:17:55,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:55,549 INFO L422 BasicCegarLoop]: trace histogram [1919, 1919, 960, 959, 959, 959, 959, 959, 959, 959, 959, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:55,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:55,750 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:55,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:55,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1195300044, now seen corresponding path program 12 times [2020-07-21 22:17:55,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:55,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830281063] [2020-07-21 22:17:55,755 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:57,819 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:57,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 6958 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 22:17:57,913 INFO L286 TraceCheckSpWp]: Computing forward predicates...