/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:56:47,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:56:47,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:56:47,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:56:47,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:56:47,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:56:47,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:56:47,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:56:47,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:56:47,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:56:47,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:56:47,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:56:47,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:56:47,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:56:47,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:56:47,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:56:47,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:56:47,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:56:47,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:56:47,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:56:47,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:56:47,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:56:47,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:56:47,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:56:47,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:56:47,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:56:47,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:56:47,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:56:47,620 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 01:56:47,636 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:56:47,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:56:47,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:56:47,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:56:47,639 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:56:47,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:56:47,639 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:56:47,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:56:47,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:56:47,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:56:47,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:56:47,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:56:47,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:56:47,640 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:56:47,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:56:47,641 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:56:47,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:56:47,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:56:47,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:56:47,642 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:56:47,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:56:47,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:56:47,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:56:47,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:56:47,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:56:47,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:56:47,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:47,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:56:47,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:56:47,644 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 01:56:47,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:56:47,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:56:48,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:56:48,001 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:56:48,002 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:56:48,003 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006_variant.i [2020-07-21 01:56:48,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcf6d4008/c0b81fb6ceee4966a5498e3dae64df7b/FLAGb76eff4d9 [2020-07-21 01:56:48,600 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:56:48,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006_variant.i [2020-07-21 01:56:48,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcf6d4008/c0b81fb6ceee4966a5498e3dae64df7b/FLAGb76eff4d9 [2020-07-21 01:56:48,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcf6d4008/c0b81fb6ceee4966a5498e3dae64df7b [2020-07-21 01:56:49,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:56:49,009 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:56:49,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:56:49,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:56:49,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:56:49,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:56:48" (1/1) ... [2020-07-21 01:56:49,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7686a361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:49, skipping insertion in model container [2020-07-21 01:56:49,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:56:48" (1/1) ... [2020-07-21 01:56:49,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:56:49,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:56:49,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:56:49,296 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:56:49,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:56:49,333 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:56:49,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:49 WrapperNode [2020-07-21 01:56:49,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:56:49,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:56:49,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:56:49,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:56:49,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:49" (1/1) ... [2020-07-21 01:56:49,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:49" (1/1) ... [2020-07-21 01:56:49,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:49" (1/1) ... [2020-07-21 01:56:49,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:49" (1/1) ... [2020-07-21 01:56:49,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:49" (1/1) ... [2020-07-21 01:56:49,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:49" (1/1) ... [2020-07-21 01:56:49,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:49" (1/1) ... [2020-07-21 01:56:49,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:56:49,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:56:49,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:56:49,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:56:49,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:49" (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 01:56:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:56:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:56:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:56:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:56:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:56:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:56:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:56:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:56:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:56:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:56:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:56:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:56:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:56:49,831 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:56:49,832 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:56:49,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:56:49 BoogieIcfgContainer [2020-07-21 01:56:49,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:56:49,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:56:49,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:56:49,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:56:49,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:56:48" (1/3) ... [2020-07-21 01:56:49,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361a7ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:56:49, skipping insertion in model container [2020-07-21 01:56:49,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:56:49" (2/3) ... [2020-07-21 01:56:49,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361a7ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:56:49, skipping insertion in model container [2020-07-21 01:56:49,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:56:49" (3/3) ... [2020-07-21 01:56:49,850 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006_variant.i [2020-07-21 01:56:49,866 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:56:49,877 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:56:49,923 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:56:49,982 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:56:49,982 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:56:49,982 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:56:49,983 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:56:49,983 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:56:49,983 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:56:49,983 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:56:49,984 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:56:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 01:56:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:56:50,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:56:50,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:56:50,012 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:56:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:56:50,018 INFO L82 PathProgramCache]: Analyzing trace with hash -362650722, now seen corresponding path program 1 times [2020-07-21 01:56:50,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:56:50,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363137879] [2020-07-21 01:56:50,028 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 01:56:50,120 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:56:50,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:56:50,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:56:50,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:56:50,253 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:56:50,309 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 01:56:50,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:56:50,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363137879] [2020-07-21 01:56:50,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:56:50,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 01:56:50,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241646945] [2020-07-21 01:56:50,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:56:50,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:50,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:56:50,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:56:50,337 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2020-07-21 01:56:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:56:50,601 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-07-21 01:56:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:56:50,604 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-07-21 01:56:50,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:56:50,615 INFO L225 Difference]: With dead ends: 47 [2020-07-21 01:56:50,616 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 01:56:50,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:56:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 01:56:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 01:56:50,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 01:56:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-21 01:56:50,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-07-21 01:56:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:56:50,673 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-21 01:56:50,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:56:50,673 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-21 01:56:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:56:50,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:56:50,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:56:50,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:50,891 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:56:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:56:50,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1126137131, now seen corresponding path program 1 times [2020-07-21 01:56:50,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:56:50,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130794915] [2020-07-21 01:56:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:56:50,930 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:56:50,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:56:50,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 01:56:50,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:56:51,040 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 01:56:51,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:56:51,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:56:51,178 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 01:56:51,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130794915] [2020-07-21 01:56:51,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:56:51,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-21 01:56:51,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971537951] [2020-07-21 01:56:51,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 01:56:51,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:51,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 01:56:51,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:56:51,184 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-21 01:56:51,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:56:51,445 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-07-21 01:56:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 01:56:51,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-21 01:56:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:56:51,447 INFO L225 Difference]: With dead ends: 26 [2020-07-21 01:56:51,447 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 01:56:51,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-07-21 01:56:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 01:56:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 01:56:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 01:56:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-21 01:56:51,456 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2020-07-21 01:56:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:56:51,456 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-21 01:56:51,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 01:56:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-21 01:56:51,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:56:51,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:56:51,458 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:56:51,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:51,660 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:56:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:56:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1467221666, now seen corresponding path program 2 times [2020-07-21 01:56:51,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:56:51,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40263144] [2020-07-21 01:56:51,663 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 01:56:51,700 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:56:51,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:56:51,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 01:56:51,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:56:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:51,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:56:51,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:56:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:52,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40263144] [2020-07-21 01:56:52,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:56:52,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-07-21 01:56:52,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982707670] [2020-07-21 01:56:52,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 01:56:52,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 01:56:52,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 01:56:52,130 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2020-07-21 01:56:52,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:56:52,893 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-07-21 01:56:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 01:56:52,894 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2020-07-21 01:56:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:56:52,896 INFO L225 Difference]: With dead ends: 32 [2020-07-21 01:56:52,896 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 01:56:52,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-07-21 01:56:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 01:56:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 01:56:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 01:56:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-07-21 01:56:52,907 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2020-07-21 01:56:52,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:56:52,907 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-07-21 01:56:52,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 01:56:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-07-21 01:56:52,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 01:56:52,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:56:52,909 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:56:53,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:53,125 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:56:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:56:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2094249470, now seen corresponding path program 3 times [2020-07-21 01:56:53,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:56:53,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940514974] [2020-07-21 01:56:53,127 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 01:56:53,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:56:53,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:56:53,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 73 conjunts are in the unsatisfiable core [2020-07-21 01:56:53,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:56:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:53,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:56:53,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:56:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:54,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940514974] [2020-07-21 01:56:54,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:56:54,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2020-07-21 01:56:54,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154754155] [2020-07-21 01:56:54,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 01:56:54,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:54,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 01:56:54,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2020-07-21 01:56:54,126 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 30 states. [2020-07-21 01:56:54,732 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-07-21 01:56:55,026 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-07-21 01:56:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:56:56,069 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-07-21 01:56:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 01:56:56,069 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 23 [2020-07-21 01:56:56,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:56:56,071 INFO L225 Difference]: With dead ends: 44 [2020-07-21 01:56:56,071 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 01:56:56,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=566, Invalid=1504, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 01:56:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 01:56:56,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 01:56:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 01:56:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-07-21 01:56:56,084 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 23 [2020-07-21 01:56:56,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:56:56,085 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-07-21 01:56:56,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 01:56:56,085 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-07-21 01:56:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-21 01:56:56,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:56:56,086 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:56:56,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:56:56,302 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:56:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:56:56,303 INFO L82 PathProgramCache]: Analyzing trace with hash -810203330, now seen corresponding path program 4 times [2020-07-21 01:56:56,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:56:56,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665012186] [2020-07-21 01:56:56,305 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 01:56:56,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:56:56,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:56:56,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-21 01:56:56,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:56:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:57,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:56:57,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:56:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:56:59,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665012186] [2020-07-21 01:56:59,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:56:59,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2020-07-21 01:56:59,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631092252] [2020-07-21 01:56:59,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-21 01:56:59,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:56:59,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-21 01:56:59,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=2220, Unknown=0, NotChecked=0, Total=2862 [2020-07-21 01:56:59,139 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 54 states. [2020-07-21 01:57:00,204 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 01:57:00,630 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 100 [2020-07-21 01:57:01,012 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 01:57:01,390 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2020-07-21 01:57:01,780 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-21 01:57:02,199 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-21 01:57:02,528 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-07-21 01:57:02,897 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 01:57:03,206 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 01:57:03,504 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 01:57:03,800 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 01:57:04,073 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 01:57:06,950 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 01:57:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:57:06,971 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2020-07-21 01:57:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-21 01:57:06,981 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 35 [2020-07-21 01:57:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:57:06,983 INFO L225 Difference]: With dead ends: 68 [2020-07-21 01:57:06,983 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 01:57:06,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1958, Invalid=4684, Unknown=0, NotChecked=0, Total=6642 [2020-07-21 01:57:06,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 01:57:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 01:57:07,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 01:57:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-07-21 01:57:07,005 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 35 [2020-07-21 01:57:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:57:07,006 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-07-21 01:57:07,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-21 01:57:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-07-21 01:57:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-21 01:57:07,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:57:07,008 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:57:07,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:57:07,224 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:57:07,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:57:07,225 INFO L82 PathProgramCache]: Analyzing trace with hash 404277694, now seen corresponding path program 5 times [2020-07-21 01:57:07,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:57:07,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004430684] [2020-07-21 01:57:07,226 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 01:57:07,332 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:57:07,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:57:07,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 289 conjunts are in the unsatisfiable core [2020-07-21 01:57:07,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:57:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:57:10,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:57:10,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:57:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:57:17,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004430684] [2020-07-21 01:57:17,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:57:17,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 102 [2020-07-21 01:57:17,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554791645] [2020-07-21 01:57:17,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-07-21 01:57:17,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:57:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-07-21 01:57:17,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2418, Invalid=7884, Unknown=0, NotChecked=0, Total=10302 [2020-07-21 01:57:17,204 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 102 states. [2020-07-21 01:57:21,252 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-07-21 01:57:22,470 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 196 [2020-07-21 01:57:23,898 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2020-07-21 01:57:24,881 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 195 [2020-07-21 01:57:26,377 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-07-21 01:57:27,974 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-07-21 01:57:29,403 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-07-21 01:57:30,803 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-07-21 01:57:32,152 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-07-21 01:57:33,502 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-07-21 01:57:34,843 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-07-21 01:57:36,114 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-07-21 01:57:37,374 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-07-21 01:57:38,644 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-07-21 01:57:39,819 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 01:57:40,971 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-07-21 01:57:42,181 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-07-21 01:57:43,337 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-07-21 01:57:44,481 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-21 01:57:45,659 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-07-21 01:57:46,782 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-07-21 01:57:47,871 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-07-21 01:57:48,846 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-07-21 01:57:49,856 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-07-21 01:57:50,859 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-07-21 01:57:51,823 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-07-21 01:57:52,777 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 01:57:53,685 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 01:57:54,579 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-21 01:57:55,443 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-21 01:57:56,239 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-07-21 01:57:57,050 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 01:57:57,820 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 01:57:58,541 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 01:57:59,244 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 01:57:59,937 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 01:58:00,594 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 01:58:01,229 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 01:58:01,834 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 01:58:02,403 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 01:58:07,966 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2020-07-21 01:58:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:58:07,989 INFO L93 Difference]: Finished difference Result 116 states and 163 transitions. [2020-07-21 01:58:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 01:58:07,992 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 59 [2020-07-21 01:58:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:58:07,993 INFO L225 Difference]: With dead ends: 116 [2020-07-21 01:58:07,993 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 01:58:08,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=7334, Invalid=16228, Unknown=0, NotChecked=0, Total=23562 [2020-07-21 01:58:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 01:58:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-21 01:58:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 01:58:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-07-21 01:58:08,033 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 59 [2020-07-21 01:58:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:58:08,034 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-07-21 01:58:08,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-07-21 01:58:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-07-21 01:58:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-21 01:58:08,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:58:08,038 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:58:08,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:08,252 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:58:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:58:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1109479102, now seen corresponding path program 6 times [2020-07-21 01:58:08,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:58:08,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178684115] [2020-07-21 01:58:08,254 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 01:58:08,462 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:58:08,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:58:08,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 577 conjunts are in the unsatisfiable core [2020-07-21 01:58:08,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:58:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:20,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:58:21,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:59:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:59:03,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178684115] [2020-07-21 01:59:03,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:59:03,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 198 [2020-07-21 01:59:03,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097601800] [2020-07-21 01:59:03,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2020-07-21 01:59:03,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:59:03,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2020-07-21 01:59:03,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9426, Invalid=29580, Unknown=0, NotChecked=0, Total=39006 [2020-07-21 01:59:03,330 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 198 states. [2020-07-21 01:59:36,726 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 484 [2020-07-21 01:59:42,006 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 482 DAG size of output: 388 [2020-07-21 01:59:56,367 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification that was a NOOP. DAG size: 479 [2020-07-21 02:00:01,418 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 481 DAG size of output: 387 [2020-07-21 02:00:16,612 WARN L193 SmtUtils]: Spent 3.24 s on a formula simplification that was a NOOP. DAG size: 474 [2020-07-21 02:00:34,012 WARN L193 SmtUtils]: Spent 3.54 s on a formula simplification that was a NOOP. DAG size: 469 [2020-07-21 02:00:51,766 WARN L193 SmtUtils]: Spent 3.78 s on a formula simplification that was a NOOP. DAG size: 464 [2020-07-21 02:01:10,405 WARN L193 SmtUtils]: Spent 3.82 s on a formula simplification that was a NOOP. DAG size: 459 [2020-07-21 02:01:29,497 WARN L193 SmtUtils]: Spent 4.01 s on a formula simplification that was a NOOP. DAG size: 454 [2020-07-21 02:01:49,302 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification that was a NOOP. DAG size: 449 [2020-07-21 02:02:03,554 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification that was a NOOP. DAG size: 444 [2020-07-21 02:02:18,054 WARN L193 SmtUtils]: Spent 3.09 s on a formula simplification that was a NOOP. DAG size: 439 [2020-07-21 02:02:32,742 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 434 [2020-07-21 02:02:47,166 WARN L193 SmtUtils]: Spent 2.95 s on a formula simplification that was a NOOP. DAG size: 429 [2020-07-21 02:03:02,249 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification that was a NOOP. DAG size: 424 [2020-07-21 02:03:17,685 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification that was a NOOP. DAG size: 419 [2020-07-21 02:03:33,243 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification that was a NOOP. DAG size: 414 [2020-07-21 02:03:48,957 WARN L193 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 409 [2020-07-21 02:04:05,738 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification that was a NOOP. DAG size: 404 [2020-07-21 02:04:22,015 WARN L193 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 399 [2020-07-21 02:04:39,392 WARN L193 SmtUtils]: Spent 3.24 s on a formula simplification that was a NOOP. DAG size: 394 [2020-07-21 02:04:57,176 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 389 [2020-07-21 02:05:15,955 WARN L193 SmtUtils]: Spent 3.29 s on a formula simplification that was a NOOP. DAG size: 384 [2020-07-21 02:05:33,068 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification that was a NOOP. DAG size: 379 [2020-07-21 02:05:50,334 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 374 [2020-07-21 02:06:07,391 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification that was a NOOP. DAG size: 369 [2020-07-21 02:06:25,672 WARN L193 SmtUtils]: Spent 3.28 s on a formula simplification that was a NOOP. DAG size: 364 [2020-07-21 02:06:45,210 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 359 [2020-07-21 02:07:04,918 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 354 [2020-07-21 02:07:24,620 WARN L193 SmtUtils]: Spent 3.11 s on a formula simplification that was a NOOP. DAG size: 349 [2020-07-21 02:07:43,580 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification that was a NOOP. DAG size: 344 [2020-07-21 02:08:03,212 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification that was a NOOP. DAG size: 339 [2020-07-21 02:08:21,045 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification that was a NOOP. DAG size: 334 [2020-07-21 02:08:38,746 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 329 [2020-07-21 02:08:56,164 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 324 [2020-07-21 02:09:13,484 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 319 [2020-07-21 02:09:30,762 WARN L193 SmtUtils]: Spent 2.73 s on a formula simplification that was a NOOP. DAG size: 314 [2020-07-21 02:09:47,986 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 309 [2020-07-21 02:10:05,104 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 02:10:21,911 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification that was a NOOP. DAG size: 299 [2020-07-21 02:10:38,708 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 294 [2020-07-21 02:10:55,327 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification that was a NOOP. DAG size: 289 [2020-07-21 02:11:11,759 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification that was a NOOP. DAG size: 284