/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 16:59:55,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:59:55,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:59:55,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:59:55,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:59:55,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:59:55,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:59:55,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:59:55,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:59:55,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:59:55,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:59:55,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:59:55,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:59:55,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:59:55,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:59:55,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:59:55,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:59:55,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:59:55,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:59:55,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:59:55,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:59:55,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:59:55,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:59:55,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:59:55,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:59:55,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:59:55,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:59:55,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:59:55,612 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 16:59:55,627 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:59:55,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:59:55,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:59:55,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:59:55,629 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:59:55,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:59:55,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:59:55,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:59:55,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:59:55,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:59:55,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:59:55,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:59:55,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:59:55,631 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:59:55,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:59:55,632 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:59:55,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:59:55,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:59:55,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:59:55,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:59:55,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:59:55,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:59:55,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:59:55,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:59:55,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:59:55,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:59:55,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:55,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:59:55,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:59:55,635 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 -> NUM_VARIABLES 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 -> 2 [2020-07-21 16:59:55,937 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:59:55,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:59:55,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:59:55,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:59:55,959 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:59:55,960 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006_variant.i [2020-07-21 16:59:56,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a723999d1/e56703df8e6141ce9b9f8c8b408d95c0/FLAG561d2719d [2020-07-21 16:59:56,498 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:59:56,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006_variant.i [2020-07-21 16:59:56,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a723999d1/e56703df8e6141ce9b9f8c8b408d95c0/FLAG561d2719d [2020-07-21 16:59:56,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a723999d1/e56703df8e6141ce9b9f8c8b408d95c0 [2020-07-21 16:59:56,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:59:56,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:59:56,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:59:56,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:59:56,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:59:56,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:56" (1/1) ... [2020-07-21 16:59:56,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cca3b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:56, skipping insertion in model container [2020-07-21 16:59:56,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:56" (1/1) ... [2020-07-21 16:59:56,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:59:56,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:59:57,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:59:57,119 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:59:57,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:59:57,159 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:59:57,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57 WrapperNode [2020-07-21 16:59:57,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:59:57,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:59:57,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:59:57,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:59:57,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:59:57,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:59:57,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:59:57,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:59:57,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (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 16:59:57,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:59:57,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:59:57,429 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:59:57,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:59:57,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:59:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:59:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:59:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:59:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:59:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:59:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:59:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:59:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:59:57,656 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:59:57,657 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 16:59:57,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:57 BoogieIcfgContainer [2020-07-21 16:59:57,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:59:57,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:59:57,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:59:57,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:59:57,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:59:56" (1/3) ... [2020-07-21 16:59:57,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b9445a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:57, skipping insertion in model container [2020-07-21 16:59:57,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (2/3) ... [2020-07-21 16:59:57,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b9445a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:57, skipping insertion in model container [2020-07-21 16:59:57,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:57" (3/3) ... [2020-07-21 16:59:57,671 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006_variant.i [2020-07-21 16:59:57,685 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:59:57,694 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:59:57,711 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:59:57,747 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:59:57,748 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:59:57,748 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:59:57,748 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:59:57,748 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:59:57,748 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:59:57,748 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:59:57,748 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:59:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 16:59:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:59:57,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:57,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:57,776 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:57,782 INFO L82 PathProgramCache]: Analyzing trace with hash -362650722, now seen corresponding path program 1 times [2020-07-21 16:59:57,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:57,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44934423] [2020-07-21 16:59:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:59:57,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:57,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 16:59:57,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:58,075 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:59:58,114 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 16:59:58,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:59:58,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44934423] [2020-07-21 16:59:58,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:59:58,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 16:59:58,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834400082] [2020-07-21 16:59:58,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:59:58,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:58,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:59:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:59:58,140 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2020-07-21 16:59:58,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:59:58,403 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-07-21 16:59:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:59:58,405 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-07-21 16:59:58,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:59:58,414 INFO L225 Difference]: With dead ends: 47 [2020-07-21 16:59:58,415 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 16:59:58,419 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 16:59:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 16:59:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 16:59:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 16:59:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-21 16:59:58,466 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-07-21 16:59:58,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:59:58,467 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-21 16:59:58,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:59:58,468 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-21 16:59:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:59:58,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:58,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:58,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:58,685 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:58,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1126137131, now seen corresponding path program 1 times [2020-07-21 16:59:58,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:58,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975822069] [2020-07-21 16:59:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:59:58,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:58,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 16:59:58,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:58,845 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 16:59:58,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:59:58,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:59:58,979 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 16:59:58,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975822069] [2020-07-21 16:59:58,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:59:58,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-21 16:59:58,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732348909] [2020-07-21 16:59:58,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 16:59:58,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:58,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 16:59:58,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:59:58,985 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-21 16:59:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:59:59,232 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-07-21 16:59:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 16:59:59,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-21 16:59:59,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:59:59,234 INFO L225 Difference]: With dead ends: 26 [2020-07-21 16:59:59,234 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 16:59:59,236 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 16:59:59,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 16:59:59,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 16:59:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 16:59:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-21 16:59:59,242 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2020-07-21 16:59:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:59:59,243 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-21 16:59:59,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 16:59:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-21 16:59:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 16:59:59,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:59,244 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:59,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:59,458 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1467221666, now seen corresponding path program 2 times [2020-07-21 16:59:59,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:59,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975368235] [2020-07-21 16:59:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:59:59,491 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:59,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:59,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 16:59:59,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:59,695 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 16:59:59,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:59:59,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:59:59,958 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 16:59:59,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975368235] [2020-07-21 16:59:59,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:59:59,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-07-21 16:59:59,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931874845] [2020-07-21 16:59:59,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:59:59,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:59,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:59:59,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:59:59,963 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2020-07-21 17:00:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:00:00,685 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-07-21 17:00:00,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 17:00:00,686 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2020-07-21 17:00:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:00:00,687 INFO L225 Difference]: With dead ends: 32 [2020-07-21 17:00:00,687 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 17:00:00,688 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 17:00:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 17:00:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 17:00:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 17:00:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-07-21 17:00:00,696 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2020-07-21 17:00:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:00:00,697 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-07-21 17:00:00,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 17:00:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-07-21 17:00:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 17:00:00,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:00:00,698 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:00:00,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:00,907 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:00:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:00:00,908 INFO L82 PathProgramCache]: Analyzing trace with hash 2094249470, now seen corresponding path program 3 times [2020-07-21 17:00:00,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:00:00,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592965296] [2020-07-21 17:00:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 17:00:00,960 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:00:00,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:00:00,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 73 conjunts are in the unsatisfiable core [2020-07-21 17:00:00,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:00:01,281 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 17:00:01,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:00:01,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:00:01,866 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 17:00:01,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592965296] [2020-07-21 17:00:01,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:00:01,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2020-07-21 17:00:01,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441776816] [2020-07-21 17:00:01,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 17:00:01,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:00:01,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 17:00:01,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2020-07-21 17:00:01,869 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 30 states. [2020-07-21 17:00:02,467 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-07-21 17:00:02,766 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-07-21 17:00:03,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:00:03,782 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-07-21 17:00:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 17:00:03,783 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 23 [2020-07-21 17:00:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:00:03,785 INFO L225 Difference]: With dead ends: 44 [2020-07-21 17:00:03,785 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 17:00:03,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=566, Invalid=1504, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 17:00:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 17:00:03,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 17:00:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 17:00:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-07-21 17:00:03,799 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 23 [2020-07-21 17:00:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:00:03,799 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-07-21 17:00:03,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 17:00:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-07-21 17:00:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-21 17:00:03,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:00:03,801 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:00:04,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:04,015 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:00:04,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:00:04,016 INFO L82 PathProgramCache]: Analyzing trace with hash -810203330, now seen corresponding path program 4 times [2020-07-21 17:00:04,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:00:04,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157625815] [2020-07-21 17:00:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 17:00:04,080 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:00:04,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:00:04,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-21 17:00:04,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:00:04,974 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 17:00:04,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:00:05,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:00:06,882 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 17:00:06,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157625815] [2020-07-21 17:00:06,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:00:06,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2020-07-21 17:00:06,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699539019] [2020-07-21 17:00:06,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-21 17:00:06,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:00:06,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-21 17:00:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=2220, Unknown=0, NotChecked=0, Total=2862 [2020-07-21 17:00:06,887 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 54 states. [2020-07-21 17:00:07,968 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 17:00:08,390 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 100 [2020-07-21 17:00:08,758 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 17:00:09,118 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2020-07-21 17:00:09,506 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-21 17:00:09,921 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-21 17:00:10,242 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-07-21 17:00:10,585 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 17:00:10,910 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 17:00:11,213 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 17:00:11,492 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 17:00:11,774 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 17:00:12,054 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 17:00:14,739 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 17:00:14,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:00:14,765 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2020-07-21 17:00:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-21 17:00:14,767 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 35 [2020-07-21 17:00:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:00:14,770 INFO L225 Difference]: With dead ends: 68 [2020-07-21 17:00:14,770 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 17:00:14,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1958, Invalid=4684, Unknown=0, NotChecked=0, Total=6642 [2020-07-21 17:00:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 17:00:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 17:00:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 17:00:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-07-21 17:00:14,803 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 35 [2020-07-21 17:00:14,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:00:14,804 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-07-21 17:00:14,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-21 17:00:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-07-21 17:00:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-21 17:00:14,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:00:14,819 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:00:15,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:15,033 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:00:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:00:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash 404277694, now seen corresponding path program 5 times [2020-07-21 17:00:15,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:00:15,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548085173] [2020-07-21 17:00:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 17:00:15,161 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:00:15,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:00:15,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 289 conjunts are in the unsatisfiable core [2020-07-21 17:00:15,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:00:18,033 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 17:00:18,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:00:18,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:00:25,308 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 17:00:25,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548085173] [2020-07-21 17:00:25,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:00:25,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 102 [2020-07-21 17:00:25,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642550782] [2020-07-21 17:00:25,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-07-21 17:00:25,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:00:25,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-07-21 17:00:25,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2418, Invalid=7884, Unknown=0, NotChecked=0, Total=10302 [2020-07-21 17:00:25,318 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 102 states. [2020-07-21 17:00:29,521 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-07-21 17:00:30,834 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 196 [2020-07-21 17:00:32,413 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2020-07-21 17:00:33,451 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 195 [2020-07-21 17:00:34,941 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-07-21 17:00:36,561 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-07-21 17:00:38,025 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-07-21 17:00:39,473 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-07-21 17:00:40,884 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-07-21 17:00:42,295 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-07-21 17:00:43,685 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-07-21 17:00:45,075 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-07-21 17:00:46,456 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-07-21 17:00:47,778 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-07-21 17:00:49,098 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 17:00:50,376 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-07-21 17:00:51,616 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-07-21 17:00:52,823 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-07-21 17:00:54,082 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-21 17:00:55,277 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-07-21 17:00:56,452 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-07-21 17:00:57,645 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-07-21 17:00:58,779 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-07-21 17:00:59,906 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-07-21 17:01:01,020 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-07-21 17:01:02,021 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-07-21 17:01:03,048 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 17:01:04,016 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 17:01:04,976 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-21 17:01:05,933 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-21 17:01:06,862 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-07-21 17:01:07,759 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 17:01:08,615 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 17:01:09,422 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 17:01:10,206 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 17:01:10,973 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 17:01:11,709 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 17:01:12,411 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 17:01:13,108 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 17:01:13,794 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 17:01:14,469 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 17:01:20,447 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2020-07-21 17:01:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:20,482 INFO L93 Difference]: Finished difference Result 116 states and 163 transitions. [2020-07-21 17:01:20,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 17:01:20,484 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 59 [2020-07-21 17:01:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:20,486 INFO L225 Difference]: With dead ends: 116 [2020-07-21 17:01:20,486 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 17:01:20,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 60.9s TimeCoverageRelationStatistics Valid=7334, Invalid=16228, Unknown=0, NotChecked=0, Total=23562 [2020-07-21 17:01:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 17:01:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-21 17:01:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 17:01:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-07-21 17:01:20,528 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 59 [2020-07-21 17:01:20,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:20,529 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-07-21 17:01:20,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-07-21 17:01:20,529 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-07-21 17:01:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-21 17:01:20,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:20,532 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:20,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:20,743 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:20,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1109479102, now seen corresponding path program 6 times [2020-07-21 17:01:20,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:20,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516170530] [2020-07-21 17:01:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 17:01:20,955 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:01:20,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:01:20,974 WARN L261 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 577 conjunts are in the unsatisfiable core [2020-07-21 17:01:20,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:36,025 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 17:01:36,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:01:36,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:02:28,350 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 17:02:28,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516170530] [2020-07-21 17:02:28,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:02:28,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 198 [2020-07-21 17:02:28,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098712603] [2020-07-21 17:02:28,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2020-07-21 17:02:28,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:02:28,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2020-07-21 17:02:28,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9426, Invalid=29580, Unknown=0, NotChecked=0, Total=39006 [2020-07-21 17:02:28,361 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 198 states. [2020-07-21 17:03:07,593 WARN L193 SmtUtils]: Spent 3.36 s on a formula simplification that was a NOOP. DAG size: 484 [2020-07-21 17:03:13,088 WARN L193 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 482 DAG size of output: 388 [2020-07-21 17:03:29,797 WARN L193 SmtUtils]: Spent 3.46 s on a formula simplification that was a NOOP. DAG size: 479 [2020-07-21 17:03:34,705 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 481 DAG size of output: 387 [2020-07-21 17:03:51,491 WARN L193 SmtUtils]: Spent 3.51 s on a formula simplification that was a NOOP. DAG size: 474 [2020-07-21 17:04:09,859 WARN L193 SmtUtils]: Spent 3.56 s on a formula simplification that was a NOOP. DAG size: 469 [2020-07-21 17:04:27,294 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification that was a NOOP. DAG size: 464 [2020-07-21 17:04:46,050 WARN L193 SmtUtils]: Spent 3.68 s on a formula simplification that was a NOOP. DAG size: 459 [2020-07-21 17:05:05,167 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification that was a NOOP. DAG size: 454 [2020-07-21 17:05:24,421 WARN L193 SmtUtils]: Spent 3.85 s on a formula simplification that was a NOOP. DAG size: 449 [2020-07-21 17:05:45,301 WARN L193 SmtUtils]: Spent 3.86 s on a formula simplification that was a NOOP. DAG size: 444 [2020-07-21 17:06:06,876 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 439 [2020-07-21 17:06:29,038 WARN L193 SmtUtils]: Spent 3.98 s on a formula simplification that was a NOOP. DAG size: 434 [2020-07-21 17:06:51,649 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 429 [2020-07-21 17:07:10,657 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification that was a NOOP. DAG size: 424 [2020-07-21 17:07:34,890 WARN L193 SmtUtils]: Spent 4.27 s on a formula simplification that was a NOOP. DAG size: 419 [2020-07-21 17:07:59,041 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 414 [2020-07-21 17:08:22,146 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 409 [2020-07-21 17:08:45,206 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification that was a NOOP. DAG size: 404 [2020-07-21 17:09:07,744 WARN L193 SmtUtils]: Spent 3.95 s on a formula simplification that was a NOOP. DAG size: 399 [2020-07-21 17:09:29,799 WARN L193 SmtUtils]: Spent 3.79 s on a formula simplification that was a NOOP. DAG size: 394 [2020-07-21 17:09:52,277 WARN L193 SmtUtils]: Spent 3.83 s on a formula simplification that was a NOOP. DAG size: 389 [2020-07-21 17:10:15,184 WARN L193 SmtUtils]: Spent 3.89 s on a formula simplification that was a NOOP. DAG size: 384 [2020-07-21 17:10:37,224 WARN L193 SmtUtils]: Spent 3.90 s on a formula simplification that was a NOOP. DAG size: 379 [2020-07-21 17:10:59,462 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification that was a NOOP. DAG size: 374 [2020-07-21 17:11:20,391 WARN L193 SmtUtils]: Spent 3.64 s on a formula simplification that was a NOOP. DAG size: 369 [2020-07-21 17:11:40,641 WARN L193 SmtUtils]: Spent 3.44 s on a formula simplification that was a NOOP. DAG size: 364 [2020-07-21 17:12:01,307 WARN L193 SmtUtils]: Spent 3.36 s on a formula simplification that was a NOOP. DAG size: 359 [2020-07-21 17:12:21,186 WARN L193 SmtUtils]: Spent 3.14 s on a formula simplification that was a NOOP. DAG size: 354 [2020-07-21 17:12:40,685 WARN L193 SmtUtils]: Spent 3.22 s on a formula simplification that was a NOOP. DAG size: 349 [2020-07-21 17:13:00,463 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 344 [2020-07-21 17:13:19,820 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 339 [2020-07-21 17:13:38,889 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification that was a NOOP. DAG size: 334 [2020-07-21 17:13:55,500 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 329 [2020-07-21 17:14:11,663 WARN L193 SmtUtils]: Spent 2.73 s on a formula simplification that was a NOOP. DAG size: 324