/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:58:31,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:58:31,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:58:31,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:58:31,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:58:31,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:58:31,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:58:31,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:58:31,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:58:31,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:58:31,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:58:31,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:58:31,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:58:31,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:58:31,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:58:31,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:58:31,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:58:31,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:58:31,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:58:31,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:58:31,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:58:31,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:58:31,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:58:31,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:58:31,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:58:31,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:58:31,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:58:31,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:58:31,595 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 01:58:31,611 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:58:31,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:58:31,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:58:31,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:58:31,613 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:58:31,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:58:31,614 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:58:31,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:58:31,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:58:31,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:58:31,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:58:31,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:58:31,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:58:31,615 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:58:31,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:58:31,615 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:58:31,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:58:31,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:58:31,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:58:31,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:58:31,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:58:31,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:58:31,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:58:31,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:58:31,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:58:31,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:58:31,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:31,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:58:31,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:58:31,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:58:31,976 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:58:31,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:58:31,994 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:58:31,996 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:58:31,996 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:58:31,997 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-07-21 01:58:32,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7773a429/ee710c721e2a447b849f767cbc35a1ec/FLAG3550f24d4 [2020-07-21 01:58:32,524 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:58:32,524 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2020-07-21 01:58:32,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7773a429/ee710c721e2a447b849f767cbc35a1ec/FLAG3550f24d4 [2020-07-21 01:58:32,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7773a429/ee710c721e2a447b849f767cbc35a1ec [2020-07-21 01:58:32,909 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:58:32,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:58:32,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:58:32,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:58:32,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:58:32,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:58:32" (1/1) ... [2020-07-21 01:58:32,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@534a0424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:32, skipping insertion in model container [2020-07-21 01:58:32,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:58:32" (1/1) ... [2020-07-21 01:58:32,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:58:32,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:58:33,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:58:33,121 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:58:33,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:58:33,150 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:58:33,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:33 WrapperNode [2020-07-21 01:58:33,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:58:33,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:58:33,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:58:33,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:58:33,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:33" (1/1) ... [2020-07-21 01:58:33,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:33" (1/1) ... [2020-07-21 01:58:33,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:33" (1/1) ... [2020-07-21 01:58:33,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:33" (1/1) ... [2020-07-21 01:58:33,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:33" (1/1) ... [2020-07-21 01:58:33,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:33" (1/1) ... [2020-07-21 01:58:33,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:33" (1/1) ... [2020-07-21 01:58:33,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:58:33,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:58:33,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:58:33,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:58:33,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:58:33,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:58:33,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:58:33,342 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:58:33,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:58:33,342 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:58:33,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:58:33,342 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:58:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:58:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:58:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:58:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:58:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:58:33,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:58:33,559 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:58:33,560 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:58:33,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:58:33 BoogieIcfgContainer [2020-07-21 01:58:33,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:58:33,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:58:33,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:58:33,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:58:33,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:58:32" (1/3) ... [2020-07-21 01:58:33,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633c4cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:58:33, skipping insertion in model container [2020-07-21 01:58:33,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:33" (2/3) ... [2020-07-21 01:58:33,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633c4cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:58:33, skipping insertion in model container [2020-07-21 01:58:33,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:58:33" (3/3) ... [2020-07-21 01:58:33,573 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-07-21 01:58:33,582 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:58:33,589 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:58:33,601 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:58:33,624 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:58:33,624 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:58:33,624 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:58:33,625 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:58:33,625 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:58:33,625 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:58:33,625 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:58:33,625 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:58:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 01:58:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:58:33,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:58:33,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:58:33,651 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:58:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:58:33,658 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-07-21 01:58:33,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:58:33,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294436975] [2020-07-21 01:58:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:33,739 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:58:33,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:58:33,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:58:33,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:58:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:33,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:58:33,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294436975] [2020-07-21 01:58:33,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:58:33,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:58:33,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51150537] [2020-07-21 01:58:33,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:58:33,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:58:33,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:58:33,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:58:33,814 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-21 01:58:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:58:33,843 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-21 01:58:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:58:33,845 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 01:58:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:58:33,855 INFO L225 Difference]: With dead ends: 33 [2020-07-21 01:58:33,855 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 01:58:33,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:58:33,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 01:58:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 01:58:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 01:58:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-21 01:58:33,903 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-07-21 01:58:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:58:33,904 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-21 01:58:33,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:58:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-21 01:58:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:58:33,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:58:33,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:58:34,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:34,123 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:58:34,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:58:34,124 INFO L82 PathProgramCache]: Analyzing trace with hash -971473804, now seen corresponding path program 1 times [2020-07-21 01:58:34,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:58:34,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353769468] [2020-07-21 01:58:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:34,159 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:58:34,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:58:34,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:58:34,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:58:34,239 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:58:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:34,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:58:34,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353769468] [2020-07-21 01:58:34,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:58:34,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 01:58:34,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306649285] [2020-07-21 01:58:34,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:58:34,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:58:34,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:58:34,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:58:34,295 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-07-21 01:58:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:58:34,395 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-21 01:58:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:58:34,396 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-07-21 01:58:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:58:34,400 INFO L225 Difference]: With dead ends: 26 [2020-07-21 01:58:34,400 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 01:58:34,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:58:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 01:58:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-07-21 01:58:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 01:58:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 01:58:34,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-07-21 01:58:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:58:34,410 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 01:58:34,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:58:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 01:58:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:58:34,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:58:34,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:58:34,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:34,627 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:58:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:58:34,629 INFO L82 PathProgramCache]: Analyzing trace with hash -18708286, now seen corresponding path program 1 times [2020-07-21 01:58:34,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:58:34,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042641634] [2020-07-21 01:58:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:34,664 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:58:34,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:58:34,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:58:34,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:58:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:34,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:58:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:34,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042641634] [2020-07-21 01:58:34,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:58:34,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-07-21 01:58:34,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357099552] [2020-07-21 01:58:34,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 01:58:34,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:58:34,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 01:58:34,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:58:34,804 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2020-07-21 01:58:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:58:34,930 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-07-21 01:58:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:58:34,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-07-21 01:58:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:58:34,932 INFO L225 Difference]: With dead ends: 31 [2020-07-21 01:58:34,932 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 01:58:34,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:58:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 01:58:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-07-21 01:58:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 01:58:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 01:58:34,939 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-07-21 01:58:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:58:34,940 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 01:58:34,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 01:58:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 01:58:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:58:34,941 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:58:34,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:58:35,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:35,156 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:58:35,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:58:35,157 INFO L82 PathProgramCache]: Analyzing trace with hash 154986550, now seen corresponding path program 1 times [2020-07-21 01:58:35,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:58:35,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399717338] [2020-07-21 01:58:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:35,197 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:58:35,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:58:35,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 01:58:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:58:35,333 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:58:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:35,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:58:35,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:58:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:35,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399717338] [2020-07-21 01:58:35,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:58:35,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-21 01:58:35,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099188775] [2020-07-21 01:58:35,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 01:58:35,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:58:35,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 01:58:35,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-21 01:58:35,693 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 17 states. [2020-07-21 01:58:36,079 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-21 01:58:36,529 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2020-07-21 01:58:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:58:36,714 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-21 01:58:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 01:58:36,714 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-07-21 01:58:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:58:36,716 INFO L225 Difference]: With dead ends: 46 [2020-07-21 01:58:36,716 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 01:58:36,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-07-21 01:58:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 01:58:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-21 01:58:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 01:58:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-21 01:58:36,725 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-07-21 01:58:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:58:36,725 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-21 01:58:36,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 01:58:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-21 01:58:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 01:58:36,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:58:36,727 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:58:36,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:36,941 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:58:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:58:36,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1027624830, now seen corresponding path program 2 times [2020-07-21 01:58:36,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:58:36,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242400838] [2020-07-21 01:58:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:36,984 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:58:36,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:58:36,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:58:36,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:58:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 01:58:37,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:58:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 01:58:37,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242400838] [2020-07-21 01:58:37,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:58:37,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 01:58:37,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805306674] [2020-07-21 01:58:37,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 01:58:37,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:58:37,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 01:58:37,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:58:37,119 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2020-07-21 01:58:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:58:37,207 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-07-21 01:58:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:58:37,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 01:58:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:58:37,210 INFO L225 Difference]: With dead ends: 43 [2020-07-21 01:58:37,210 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 01:58:37,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:58:37,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 01:58:37,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 01:58:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 01:58:37,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-07-21 01:58:37,219 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2020-07-21 01:58:37,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:58:37,219 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-07-21 01:58:37,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 01:58:37,219 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-07-21 01:58:37,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 01:58:37,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:58:37,221 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:58:37,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:37,437 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:58:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:58:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash -490417350, now seen corresponding path program 3 times [2020-07-21 01:58:37,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:58:37,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312287563] [2020-07-21 01:58:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:37,478 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:58:37,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:58:37,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 01:58:37,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:58:37,672 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:58:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:37,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:58:37,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:58:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:38,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312287563] [2020-07-21 01:58:38,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:58:38,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2020-07-21 01:58:38,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622385343] [2020-07-21 01:58:38,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 01:58:38,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:58:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 01:58:38,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-07-21 01:58:38,499 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2020-07-21 01:58:39,229 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-07-21 01:58:39,405 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-07-21 01:58:39,706 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-07-21 01:58:40,277 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-07-21 01:58:40,446 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:58:40,619 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-21 01:58:41,110 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-07-21 01:58:41,281 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-07-21 01:58:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:58:41,616 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-07-21 01:58:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 01:58:41,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2020-07-21 01:58:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:58:41,619 INFO L225 Difference]: With dead ends: 62 [2020-07-21 01:58:41,619 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 01:58:41,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=578, Invalid=2392, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 01:58:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 01:58:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-21 01:58:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 01:58:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-07-21 01:58:41,644 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 29 [2020-07-21 01:58:41,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:58:41,645 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-07-21 01:58:41,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 01:58:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-07-21 01:58:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 01:58:41,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:58:41,650 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:58:41,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:41,863 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:58:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:58:41,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2033682622, now seen corresponding path program 4 times [2020-07-21 01:58:41,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:58:41,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132274667] [2020-07-21 01:58:41,865 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:41,907 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:58:41,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:58:41,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-21 01:58:41,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:58:42,432 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:58:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:42,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:58:42,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:58:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:44,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132274667] [2020-07-21 01:58:44,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:58:44,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-07-21 01:58:44,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895907097] [2020-07-21 01:58:44,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-21 01:58:44,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:58:44,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-21 01:58:44,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 01:58:44,841 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2020-07-21 01:58:47,152 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 01:58:47,851 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:58:48,056 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:58:48,660 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:58:48,871 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 01:58:49,082 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:58:49,265 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:58:49,471 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 01:58:49,875 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 01:58:50,298 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 01:58:50,553 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 01:58:50,875 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 01:58:51,303 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 01:58:51,741 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 01:58:51,932 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 01:58:52,156 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 01:58:52,372 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 01:58:52,606 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 01:58:52,833 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 01:58:53,177 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 01:58:53,444 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 01:58:53,778 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 01:58:53,984 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 01:58:54,228 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 01:58:54,473 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 01:58:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:58:54,931 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-07-21 01:58:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-21 01:58:54,932 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2020-07-21 01:58:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:58:54,934 INFO L225 Difference]: With dead ends: 114 [2020-07-21 01:58:54,934 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 01:58:54,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=2424, Invalid=9786, Unknown=0, NotChecked=0, Total=12210 [2020-07-21 01:58:54,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 01:58:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-07-21 01:58:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 01:58:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-07-21 01:58:54,958 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 53 [2020-07-21 01:58:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:58:54,959 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-07-21 01:58:54,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-21 01:58:54,959 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-07-21 01:58:54,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-21 01:58:54,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:58:54,963 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:58:55,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:55,165 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:58:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:58:55,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1181026478, now seen corresponding path program 5 times [2020-07-21 01:58:55,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:58:55,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39082135] [2020-07-21 01:58:55,167 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 01:58:55,233 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:58:55,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:58:55,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 98 conjunts are in the unsatisfiable core [2020-07-21 01:58:55,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:58:57,149 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:58:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:57,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:58:57,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:59:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:59:06,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39082135] [2020-07-21 01:59:06,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:59:06,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 101 [2020-07-21 01:59:06,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923437635] [2020-07-21 01:59:06,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-21 01:59:06,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:59:06,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-21 01:59:06,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=7951, Unknown=0, NotChecked=0, Total=10100 [2020-07-21 01:59:06,357 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2020-07-21 01:59:11,403 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 01:59:11,728 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 01:59:12,013 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-21 01:59:12,276 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-07-21 01:59:12,542 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-21 01:59:13,222 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 01:59:13,517 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 01:59:13,836 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:14,103 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:59:14,406 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:14,671 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:14,992 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:15,311 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 01:59:15,651 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:15,942 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:59:16,268 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 01:59:16,551 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 01:59:16,897 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 01:59:17,227 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 01:59:17,553 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 01:59:17,848 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 01:59:18,194 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:18,496 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:18,847 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:19,193 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 01:59:19,564 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:19,873 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:59:20,228 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:20,538 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:20,915 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:21,366 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 01:59:21,725 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:22,031 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:59:22,457 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:22,777 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:23,162 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:23,567 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 01:59:23,952 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:24,296 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:59:24,704 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:25,050 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:25,452 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:25,862 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 01:59:26,279 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:26,632 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:59:27,050 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:27,428 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:27,855 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:28,365 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 01:59:28,822 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:29,211 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:59:29,644 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:30,001 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:30,389 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:30,812 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 01:59:31,267 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:31,663 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:59:32,142 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:32,554 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:33,021 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:33,602 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 01:59:34,091 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 01:59:34,497 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:59:34,950 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:35,369 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 01:59:35,857 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 01:59:36,376 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 01:59:36,866 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 01:59:37,282 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 01:59:37,808 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 01:59:38,215 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 01:59:38,689 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 01:59:39,202 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 01:59:39,788 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 01:59:40,257 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 01:59:40,838 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 01:59:41,343 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 01:59:41,937 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 01:59:42,648 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 01:59:43,281 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 01:59:43,787 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 01:59:44,386 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 01:59:44,899 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 01:59:45,512 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 01:59:46,157 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 01:59:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:59:47,419 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2020-07-21 01:59:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2020-07-21 01:59:47,422 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2020-07-21 01:59:47,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:59:47,426 INFO L225 Difference]: With dead ends: 218 [2020-07-21 01:59:47,426 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 01:59:47,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12145 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=10004, Invalid=39502, Unknown=0, NotChecked=0, Total=49506 [2020-07-21 01:59:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 01:59:47,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 01:59:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 01:59:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2020-07-21 01:59:47,465 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 101 [2020-07-21 01:59:47,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:59:47,466 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2020-07-21 01:59:47,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-21 01:59:47,466 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2020-07-21 01:59:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-21 01:59:47,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:59:47,470 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:59:47,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:59:47,671 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:59:47,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:59:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1984747378, now seen corresponding path program 6 times [2020-07-21 01:59:47,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:59:47,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301917064] [2020-07-21 01:59:47,673 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 01:59:47,796 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:59:47,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:59:47,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 194 conjunts are in the unsatisfiable core [2020-07-21 01:59:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:59:59,813 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 02:00:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:00:00,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:00:00,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:00:02,428 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 02:01:01,707 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:01:03,105 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:01:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:01:17,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301917064] [2020-07-21 02:01:17,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:01:17,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 197 [2020-07-21 02:01:17,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506734306] [2020-07-21 02:01:17,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2020-07-21 02:01:17,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:01:17,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2020-07-21 02:01:17,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8621, Invalid=29991, Unknown=0, NotChecked=0, Total=38612 [2020-07-21 02:01:17,440 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 197 states. [2020-07-21 02:02:11,495 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-07-21 02:02:12,376 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-07-21 02:02:13,894 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 02:02:15,167 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 02:02:16,190 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-21 02:02:17,370 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-07-21 02:02:18,243 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-21 02:02:19,367 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 02:02:20,539 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 02:02:21,884 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 02:02:23,536 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:02:24,949 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:02:26,184 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:02:27,557 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:02:28,993 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:02:30,577 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:02:32,433 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 02:02:33,875 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:02:35,169 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:02:36,942 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 02:02:38,521 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 02:02:40,208 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 02:02:42,072 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 02:02:43,644 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 02:02:44,979 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 02:02:46,523 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:02:48,095 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:02:49,874 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:02:51,785 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:02:53,424 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:02:54,829 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:02:56,531 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:02:58,070 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:02:59,763 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:03:01,723 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:03:03,714 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:03:05,286 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:03:06,921 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:03:08,424 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:03:10,090 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:03:11,945 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:03:13,641 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:03:15,052 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:03:16,863 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:03:18,201 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:03:19,959 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:03:22,131 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:03:23,992 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:03:25,486 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:03:27,418 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:03:28,984 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:03:30,706 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:03:32,575 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:03:34,097 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:03:35,634 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:03:37,888 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:03:39,695 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:03:41,689 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:03:44,192 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:03:46,160 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:03:47,938 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:03:49,914 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:03:51,768 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:03:54,052 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:03:56,660 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:03:58,739 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:04:00,548 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:04:02,974 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:04:04,931 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:04:07,014 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:04:09,978 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:04:12,172 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:04:14,119 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:04:16,310 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:04:18,329 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:04:20,524 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:04:23,439 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:04:25,361 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:04:27,109 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:04:29,489 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:04:31,766 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:04:34,109 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:04:36,708 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:04:38,585 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:04:40,161 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:04:42,210 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:04:44,195 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:04:46,294 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:04:48,896 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:04:51,513 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:04:53,602 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:04:55,969 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:04:58,051 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:05:00,239 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:05:02,908 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:05:05,428 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:05:07,699 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:05:10,212 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:05:12,770 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:05:15,415 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:05:18,891 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:05:21,414 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:05:23,691 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:05:26,607 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:05:28,868 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:05:31,403 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:05:34,819 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:05:37,138 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:05:39,172 WARN L193 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:05:41,737 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:05:44,113 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:05:47,069 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:05:50,360 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:05:53,485 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:05:56,059 WARN L193 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:05:59,152 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:06:01,949 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:06:04,827 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:06:07,996 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:06:10,421 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:06:12,675 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:06:15,339 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:06:17,814 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:06:20,473 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:06:23,830 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:06:27,061 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:06:29,818 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:06:32,933 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:06:35,786 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:06:38,888 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:06:42,566 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:06:45,454 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:06:48,084 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:06:51,049 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:06:53,648 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:06:56,584 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:07:00,607 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:07:03,308 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:07:05,608 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:07:09,184 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:07:11,827 WARN L193 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:07:15,036 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:07:19,141 WARN L193 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:07:22,754 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:07:25,615 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:07:28,611 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:07:31,283 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:07:34,213 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:07:37,847 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:07:40,996 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:07:43,400 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:07:46,332 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:07:48,280 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:07:50,415 WARN L193 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:07:53,220 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:07:55,894 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:07:58,125 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:08:00,513 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:08:02,674 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:08:05,074 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:08:07,913 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 02:08:09,866 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 02:08:11,577 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:08:13,816 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:08:15,747 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 02:08:18,121 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 02:08:21,120 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 02:08:23,339 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 02:08:25,277 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 02:08:27,737 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 02:08:29,893 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 02:08:32,265 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 02:08:35,136 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 02:08:37,709 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 02:08:39,778 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 02:08:42,088 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 02:08:44,270 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 02:08:46,688 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 02:08:49,879 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 02:08:52,622 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 02:08:54,855 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 02:08:57,479 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 02:08:59,810 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 02:09:02,411 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 02:09:05,681 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 02:09:06,866 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 02:09:07,762 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 02:09:09,347 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 02:09:11,126 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-07-21 02:09:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:09:11,201 INFO L93 Difference]: Finished difference Result 426 states and 457 transitions. [2020-07-21 02:09:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2020-07-21 02:09:11,209 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 197 [2020-07-21 02:09:11,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:09:11,214 INFO L225 Difference]: With dead ends: 426 [2020-07-21 02:09:11,215 INFO L226 Difference]: Without dead ends: 390 [2020-07-21 02:09:11,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50369 ImplicationChecksByTransitivity, 500.4s TimeCoverageRelationStatistics Valid=40716, Invalid=158646, Unknown=0, NotChecked=0, Total=199362 [2020-07-21 02:09:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-07-21 02:09:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2020-07-21 02:09:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-07-21 02:09:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 390 transitions. [2020-07-21 02:09:11,296 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 390 transitions. Word has length 197 [2020-07-21 02:09:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:09:11,296 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 390 transitions. [2020-07-21 02:09:11,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 197 states. [2020-07-21 02:09:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 390 transitions. [2020-07-21 02:09:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-21 02:09:11,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:09:11,314 INFO L422 BasicCegarLoop]: trace histogram [126, 126, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:09:11,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:09:11,527 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:09:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:09:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash -354150478, now seen corresponding path program 7 times [2020-07-21 02:09:11,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:09:11,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702747681] [2020-07-21 02:09:11,530 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 02:09:11,792 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:09:11,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:09:11,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 386 conjunts are in the unsatisfiable core [2020-07-21 02:09:11,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:11:03,526 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 02:11:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 23751 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:11:06,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:11:09,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:11:17,117 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 02:11:19,061 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 02:11:20,990 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 02:11:22,942 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 02:11:24,919 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 02:11:26,939 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 02:11:29,027 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 02:11:30,958 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 02:11:32,910 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:34,962 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:36,926 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:38,911 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:41,104 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:43,273 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:45,406 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:47,559 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:49,773 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:51,964 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:54,225 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:56,422 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:11:58,581 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:00,772 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:02,977 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:05,200 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:07,480 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:09,650 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:11,836 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:14,281 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:16,531 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:18,840 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:21,304 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:23,547 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:25,802 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:28,275 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:30,646 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:33,008 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:35,530 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:37,939 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:40,358 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:42,937 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:45,310 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:47,674 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 02:12:50,309 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 24