/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 DAGSIZE --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/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 23:04:02,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 23:04:02,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 23:04:02,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 23:04:02,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 23:04:02,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 23:04:02,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 23:04:02,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 23:04:02,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 23:04:02,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 23:04:02,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 23:04:02,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 23:04:02,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 23:04:02,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 23:04:02,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 23:04:02,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 23:04:02,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 23:04:02,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 23:04:02,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 23:04:02,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 23:04:02,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 23:04:02,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 23:04:02,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 23:04:02,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 23:04:02,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 23:04:02,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 23:04:02,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 23:04:02,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 23:04:02,629 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 [2020-07-20 23:04:02,644 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 23:04:02,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 23:04:02,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 23:04:02,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 23:04:02,646 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 23:04:02,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 23:04:02,646 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 23:04:02,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 23:04:02,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 23:04:02,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 23:04:02,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 23:04:02,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 23:04:02,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 23:04:02,648 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 23:04:02,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 23:04:02,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 23:04:02,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 23:04:02,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 23:04:02,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 23:04:02,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 23:04:02,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 23:04:02,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:04:02,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 23:04:02,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 23:04:02,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 23:04:02,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 23:04:02,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:02,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 23:04:02,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 23:04:02,651 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 -> DAGSIZE 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 [2020-07-20 23:04:02,926 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 23:04:02,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 23:04:02,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 23:04:02,947 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 23:04:02,950 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 23:04:02,950 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 23:04:03,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58e6a2f32/44602e6f155f4e50a5b39b2e9738e345/FLAG60ceb038c [2020-07-20 23:04:03,671 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 23:04:03,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 23:04:03,699 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58e6a2f32/44602e6f155f4e50a5b39b2e9738e345/FLAG60ceb038c [2020-07-20 23:04:03,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58e6a2f32/44602e6f155f4e50a5b39b2e9738e345 [2020-07-20 23:04:03,864 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 23:04:03,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 23:04:03,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 23:04:03,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 23:04:03,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 23:04:03,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:04:03" (1/1) ... [2020-07-20 23:04:03,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@234a323e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:03, skipping insertion in model container [2020-07-20 23:04:03,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:04:03" (1/1) ... [2020-07-20 23:04:03,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 23:04:04,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 23:04:05,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:04:05,021 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 23:04:05,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:04:05,591 INFO L208 MainTranslator]: Completed translation [2020-07-20 23:04:05,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:05 WrapperNode [2020-07-20 23:04:05,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 23:04:05,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 23:04:05,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 23:04:05,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 23:04:05,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:05" (1/1) ... [2020-07-20 23:04:05,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:05" (1/1) ... [2020-07-20 23:04:05,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:05" (1/1) ... [2020-07-20 23:04:05,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:05" (1/1) ... [2020-07-20 23:04:05,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:05" (1/1) ... [2020-07-20 23:04:05,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:05" (1/1) ... [2020-07-20 23:04:05,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:05" (1/1) ... [2020-07-20 23:04:05,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 23:04:05,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 23:04:05,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 23:04:05,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 23:04:05,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:05" (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 [2020-07-20 23:04:05,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 23:04:05,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 23:04:05,978 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 23:04:05,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 23:04:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 23:04:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 23:04:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 23:04:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 23:04:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 23:04:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 23:04:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 23:04:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 23:04:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 23:04:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 23:04:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 23:04:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 23:04:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 23:04:05,982 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 23:04:05,982 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 23:04:05,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 23:04:05,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 23:04:05,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 23:04:08,735 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 23:04:08,735 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 23:04:08,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:04:08 BoogieIcfgContainer [2020-07-20 23:04:08,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 23:04:08,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 23:04:08,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 23:04:08,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 23:04:08,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:04:03" (1/3) ... [2020-07-20 23:04:08,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70929306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:04:08, skipping insertion in model container [2020-07-20 23:04:08,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:05" (2/3) ... [2020-07-20 23:04:08,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70929306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:04:08, skipping insertion in model container [2020-07-20 23:04:08,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:04:08" (3/3) ... [2020-07-20 23:04:08,754 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 23:04:08,765 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 23:04:08,774 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 23:04:08,789 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 23:04:08,816 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 23:04:08,816 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 23:04:08,817 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 23:04:08,817 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 23:04:08,817 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 23:04:08,817 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 23:04:08,817 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 23:04:08,817 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 23:04:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-07-20 23:04:08,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 23:04:08,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:08,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:08,875 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:08,882 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-07-20 23:04:08,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:08,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121314182] [2020-07-20 23:04:08,893 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 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 [2020-07-20 23:04:09,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:09,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:09,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:09,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:09,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121314182] [2020-07-20 23:04:09,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:09,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:09,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504233381] [2020-07-20 23:04:09,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:09,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:09,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:09,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:09,754 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 3 states. [2020-07-20 23:04:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:10,034 INFO L93 Difference]: Finished difference Result 1140 states and 1981 transitions. [2020-07-20 23:04:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:10,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-20 23:04:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:10,085 INFO L225 Difference]: With dead ends: 1140 [2020-07-20 23:04:10,086 INFO L226 Difference]: Without dead ends: 973 [2020-07-20 23:04:10,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-07-20 23:04:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 971. [2020-07-20 23:04:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 971 states. [2020-07-20 23:04:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1536 transitions. [2020-07-20 23:04:10,301 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1536 transitions. Word has length 318 [2020-07-20 23:04:10,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:10,303 INFO L479 AbstractCegarLoop]: Abstraction has 971 states and 1536 transitions. [2020-07-20 23:04:10,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1536 transitions. [2020-07-20 23:04:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 23:04:10,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:10,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:10,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:10,525 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:10,526 INFO L82 PathProgramCache]: Analyzing trace with hash -566193409, now seen corresponding path program 1 times [2020-07-20 23:04:10,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:10,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610824554] [2020-07-20 23:04:10,526 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 [2020-07-20 23:04:10,861 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:10,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:10,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:10,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:11,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:11,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610824554] [2020-07-20 23:04:11,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:11,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:11,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912986960] [2020-07-20 23:04:11,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:11,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:11,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:11,035 INFO L87 Difference]: Start difference. First operand 971 states and 1536 transitions. Second operand 4 states. [2020-07-20 23:04:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:11,278 INFO L93 Difference]: Finished difference Result 2849 states and 4503 transitions. [2020-07-20 23:04:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:11,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-20 23:04:11,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:11,291 INFO L225 Difference]: With dead ends: 2849 [2020-07-20 23:04:11,292 INFO L226 Difference]: Without dead ends: 1895 [2020-07-20 23:04:11,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:11,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2020-07-20 23:04:11,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1893. [2020-07-20 23:04:11,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1893 states. [2020-07-20 23:04:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2976 transitions. [2020-07-20 23:04:11,404 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2976 transitions. Word has length 318 [2020-07-20 23:04:11,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:11,409 INFO L479 AbstractCegarLoop]: Abstraction has 1893 states and 2976 transitions. [2020-07-20 23:04:11,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2976 transitions. [2020-07-20 23:04:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-20 23:04:11,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:11,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:11,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:11,633 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash -842224244, now seen corresponding path program 1 times [2020-07-20 23:04:11,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:11,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227933720] [2020-07-20 23:04:11,636 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 [2020-07-20 23:04:11,895 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:11,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:11,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:11,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:12,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:12,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227933720] [2020-07-20 23:04:12,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:12,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:12,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293522266] [2020-07-20 23:04:12,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:12,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:12,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:12,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:12,068 INFO L87 Difference]: Start difference. First operand 1893 states and 2976 transitions. Second operand 4 states. [2020-07-20 23:04:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:12,324 INFO L93 Difference]: Finished difference Result 5580 states and 8766 transitions. [2020-07-20 23:04:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:12,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2020-07-20 23:04:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:12,344 INFO L225 Difference]: With dead ends: 5580 [2020-07-20 23:04:12,345 INFO L226 Difference]: Without dead ends: 3707 [2020-07-20 23:04:12,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2020-07-20 23:04:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 3705. [2020-07-20 23:04:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3705 states. [2020-07-20 23:04:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 5788 transitions. [2020-07-20 23:04:12,512 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 5788 transitions. Word has length 320 [2020-07-20 23:04:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:12,513 INFO L479 AbstractCegarLoop]: Abstraction has 3705 states and 5788 transitions. [2020-07-20 23:04:12,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 5788 transitions. [2020-07-20 23:04:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-20 23:04:12,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:12,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:12,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:12,738 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:12,739 INFO L82 PathProgramCache]: Analyzing trace with hash -182889436, now seen corresponding path program 1 times [2020-07-20 23:04:12,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:12,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27010542] [2020-07-20 23:04:12,740 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 [2020-07-20 23:04:12,960 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:12,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:12,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:13,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:13,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27010542] [2020-07-20 23:04:13,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:13,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:13,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551772606] [2020-07-20 23:04:13,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:13,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:13,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:13,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:13,099 INFO L87 Difference]: Start difference. First operand 3705 states and 5788 transitions. Second operand 3 states. [2020-07-20 23:04:13,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:13,354 INFO L93 Difference]: Finished difference Result 11071 states and 17298 transitions. [2020-07-20 23:04:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:13,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 322 [2020-07-20 23:04:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:13,391 INFO L225 Difference]: With dead ends: 11071 [2020-07-20 23:04:13,391 INFO L226 Difference]: Without dead ends: 7384 [2020-07-20 23:04:13,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7384 states. [2020-07-20 23:04:13,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7384 to 3720. [2020-07-20 23:04:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-07-20 23:04:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5809 transitions. [2020-07-20 23:04:13,687 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5809 transitions. Word has length 322 [2020-07-20 23:04:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:13,688 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5809 transitions. [2020-07-20 23:04:13,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5809 transitions. [2020-07-20 23:04:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-07-20 23:04:13,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:13,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:13,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:13,902 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:13,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:13,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1341185128, now seen corresponding path program 1 times [2020-07-20 23:04:13,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:13,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534463856] [2020-07-20 23:04:13,903 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 [2020-07-20 23:04:14,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:14,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:14,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:14,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:14,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534463856] [2020-07-20 23:04:14,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:14,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:14,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043753917] [2020-07-20 23:04:14,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:14,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:14,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:14,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:14,290 INFO L87 Difference]: Start difference. First operand 3720 states and 5809 transitions. Second operand 4 states. [2020-07-20 23:04:14,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:14,785 INFO L93 Difference]: Finished difference Result 10882 states and 16973 transitions. [2020-07-20 23:04:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:14,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 323 [2020-07-20 23:04:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:14,820 INFO L225 Difference]: With dead ends: 10882 [2020-07-20 23:04:14,821 INFO L226 Difference]: Without dead ends: 7260 [2020-07-20 23:04:14,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:14,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7260 states. [2020-07-20 23:04:15,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7260 to 7258. [2020-07-20 23:04:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7258 states. [2020-07-20 23:04:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 11263 transitions. [2020-07-20 23:04:15,155 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 11263 transitions. Word has length 323 [2020-07-20 23:04:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:15,155 INFO L479 AbstractCegarLoop]: Abstraction has 7258 states and 11263 transitions. [2020-07-20 23:04:15,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 11263 transitions. [2020-07-20 23:04:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 23:04:15,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:15,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:15,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:15,385 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:15,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:15,385 INFO L82 PathProgramCache]: Analyzing trace with hash 254808638, now seen corresponding path program 1 times [2020-07-20 23:04:15,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:15,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305617884] [2020-07-20 23:04:15,386 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 [2020-07-20 23:04:15,618 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:15,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:15,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:04:15,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:15,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:15,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305617884] [2020-07-20 23:04:15,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:15,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:15,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328652222] [2020-07-20 23:04:15,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:15,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:15,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:15,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:15,785 INFO L87 Difference]: Start difference. First operand 7258 states and 11263 transitions. Second operand 4 states. [2020-07-20 23:04:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:16,306 INFO L93 Difference]: Finished difference Result 20326 states and 31407 transitions. [2020-07-20 23:04:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:16,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-20 23:04:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:16,349 INFO L225 Difference]: With dead ends: 20326 [2020-07-20 23:04:16,349 INFO L226 Difference]: Without dead ends: 13608 [2020-07-20 23:04:16,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13608 states. [2020-07-20 23:04:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13608 to 7753. [2020-07-20 23:04:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7753 states. [2020-07-20 23:04:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7753 states to 7753 states and 12106 transitions. [2020-07-20 23:04:16,941 INFO L78 Accepts]: Start accepts. Automaton has 7753 states and 12106 transitions. Word has length 324 [2020-07-20 23:04:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:16,942 INFO L479 AbstractCegarLoop]: Abstraction has 7753 states and 12106 transitions. [2020-07-20 23:04:16,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:16,942 INFO L276 IsEmpty]: Start isEmpty. Operand 7753 states and 12106 transitions. [2020-07-20 23:04:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 23:04:16,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:16,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:17,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:17,173 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1404468205, now seen corresponding path program 1 times [2020-07-20 23:04:17,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:17,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337274107] [2020-07-20 23:04:17,175 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 [2020-07-20 23:04:17,391 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:17,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:17,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:04:17,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:17,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:17,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337274107] [2020-07-20 23:04:17,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:17,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:17,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193897029] [2020-07-20 23:04:17,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:17,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:17,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:17,463 INFO L87 Difference]: Start difference. First operand 7753 states and 12106 transitions. Second operand 4 states. [2020-07-20 23:04:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:18,146 INFO L93 Difference]: Finished difference Result 21259 states and 32998 transitions. [2020-07-20 23:04:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:18,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 23:04:18,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:18,179 INFO L225 Difference]: With dead ends: 21259 [2020-07-20 23:04:18,180 INFO L226 Difference]: Without dead ends: 14455 [2020-07-20 23:04:18,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14455 states. [2020-07-20 23:04:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14455 to 8614. [2020-07-20 23:04:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8614 states. [2020-07-20 23:04:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8614 states to 8614 states and 13569 transitions. [2020-07-20 23:04:18,638 INFO L78 Accepts]: Start accepts. Automaton has 8614 states and 13569 transitions. Word has length 326 [2020-07-20 23:04:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:18,638 INFO L479 AbstractCegarLoop]: Abstraction has 8614 states and 13569 transitions. [2020-07-20 23:04:18,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 8614 states and 13569 transitions. [2020-07-20 23:04:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 23:04:18,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:18,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:18,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:18,873 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:18,873 INFO L82 PathProgramCache]: Analyzing trace with hash -373959261, now seen corresponding path program 1 times [2020-07-20 23:04:18,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:18,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587707109] [2020-07-20 23:04:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:19,100 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:19,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:19,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:19,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:19,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587707109] [2020-07-20 23:04:19,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:19,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:19,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345378680] [2020-07-20 23:04:19,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:19,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:19,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:19,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:19,180 INFO L87 Difference]: Start difference. First operand 8614 states and 13569 transitions. Second operand 3 states. [2020-07-20 23:04:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:20,127 INFO L93 Difference]: Finished difference Result 22186 states and 34371 transitions. [2020-07-20 23:04:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:20,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 23:04:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:20,162 INFO L225 Difference]: With dead ends: 22186 [2020-07-20 23:04:20,163 INFO L226 Difference]: Without dead ends: 15417 [2020-07-20 23:04:20,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15417 states. [2020-07-20 23:04:20,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15417 to 8795. [2020-07-20 23:04:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8795 states. [2020-07-20 23:04:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8795 states to 8795 states and 13790 transitions. [2020-07-20 23:04:20,669 INFO L78 Accepts]: Start accepts. Automaton has 8795 states and 13790 transitions. Word has length 328 [2020-07-20 23:04:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:20,670 INFO L479 AbstractCegarLoop]: Abstraction has 8795 states and 13790 transitions. [2020-07-20 23:04:20,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 8795 states and 13790 transitions. [2020-07-20 23:04:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 23:04:20,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:20,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:20,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:20,964 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:20,964 INFO L82 PathProgramCache]: Analyzing trace with hash 775863665, now seen corresponding path program 1 times [2020-07-20 23:04:20,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:20,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388166472] [2020-07-20 23:04:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:21,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:21,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:21,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:04:21,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:21,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:21,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388166472] [2020-07-20 23:04:21,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:21,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 23:04:21,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18152652] [2020-07-20 23:04:21,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 23:04:21,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:21,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 23:04:21,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 23:04:21,338 INFO L87 Difference]: Start difference. First operand 8795 states and 13790 transitions. Second operand 9 states. [2020-07-20 23:04:29,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:29,578 INFO L93 Difference]: Finished difference Result 69205 states and 108947 transitions. [2020-07-20 23:04:29,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 23:04:29,578 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 328 [2020-07-20 23:04:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:29,722 INFO L225 Difference]: With dead ends: 69205 [2020-07-20 23:04:29,723 INFO L226 Difference]: Without dead ends: 67179 [2020-07-20 23:04:29,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 23:04:29,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67179 states. [2020-07-20 23:04:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67179 to 20395. [2020-07-20 23:04:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20395 states. [2020-07-20 23:04:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20395 states to 20395 states and 31842 transitions. [2020-07-20 23:04:31,337 INFO L78 Accepts]: Start accepts. Automaton has 20395 states and 31842 transitions. Word has length 328 [2020-07-20 23:04:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:31,338 INFO L479 AbstractCegarLoop]: Abstraction has 20395 states and 31842 transitions. [2020-07-20 23:04:31,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 23:04:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 20395 states and 31842 transitions. [2020-07-20 23:04:31,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 23:04:31,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:31,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:31,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:31,577 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:31,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:31,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1714108007, now seen corresponding path program 1 times [2020-07-20 23:04:31,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:31,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801107475] [2020-07-20 23:04:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:31,866 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:04:31,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:31,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:31,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:32,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:32,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801107475] [2020-07-20 23:04:32,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:32,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:32,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619220094] [2020-07-20 23:04:32,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:32,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:32,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:32,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:32,008 INFO L87 Difference]: Start difference. First operand 20395 states and 31842 transitions. Second operand 3 states. [2020-07-20 23:04:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:33,539 INFO L93 Difference]: Finished difference Result 43526 states and 68135 transitions. [2020-07-20 23:04:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:33,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 23:04:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:33,596 INFO L225 Difference]: With dead ends: 43526 [2020-07-20 23:04:33,597 INFO L226 Difference]: Without dead ends: 28493 [2020-07-20 23:04:33,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:33,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28493 states. [2020-07-20 23:04:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28493 to 25208. [2020-07-20 23:04:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25208 states. [2020-07-20 23:04:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25208 states to 25208 states and 39655 transitions. [2020-07-20 23:04:34,820 INFO L78 Accepts]: Start accepts. Automaton has 25208 states and 39655 transitions. Word has length 328 [2020-07-20 23:04:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:34,820 INFO L479 AbstractCegarLoop]: Abstraction has 25208 states and 39655 transitions. [2020-07-20 23:04:34,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 25208 states and 39655 transitions. [2020-07-20 23:04:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 23:04:34,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:34,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:35,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:35,053 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:35,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1373163361, now seen corresponding path program 1 times [2020-07-20 23:04:35,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:35,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427894350] [2020-07-20 23:04:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:35,277 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:35,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:35,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:04:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:35,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:35,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427894350] [2020-07-20 23:04:35,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:35,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:35,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887919337] [2020-07-20 23:04:35,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:35,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:35,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:35,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:35,362 INFO L87 Difference]: Start difference. First operand 25208 states and 39655 transitions. Second operand 4 states. [2020-07-20 23:04:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:38,148 INFO L93 Difference]: Finished difference Result 71150 states and 111633 transitions. [2020-07-20 23:04:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:38,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 23:04:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:38,207 INFO L225 Difference]: With dead ends: 71150 [2020-07-20 23:04:38,207 INFO L226 Difference]: Without dead ends: 47811 [2020-07-20 23:04:38,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:38,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47811 states. [2020-07-20 23:04:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47811 to 26330. [2020-07-20 23:04:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26330 states. [2020-07-20 23:04:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26330 states to 26330 states and 41596 transitions. [2020-07-20 23:04:39,792 INFO L78 Accepts]: Start accepts. Automaton has 26330 states and 41596 transitions. Word has length 330 [2020-07-20 23:04:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:39,792 INFO L479 AbstractCegarLoop]: Abstraction has 26330 states and 41596 transitions. [2020-07-20 23:04:39,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 26330 states and 41596 transitions. [2020-07-20 23:04:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 23:04:39,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:39,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:40,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:40,009 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:40,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1561258961, now seen corresponding path program 1 times [2020-07-20 23:04:40,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:40,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429561689] [2020-07-20 23:04:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:40,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:04:40,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:40,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:40,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:40,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:40,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429561689] [2020-07-20 23:04:40,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:40,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:40,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317905348] [2020-07-20 23:04:40,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:40,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:40,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:40,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:40,420 INFO L87 Difference]: Start difference. First operand 26330 states and 41596 transitions. Second operand 4 states. [2020-07-20 23:04:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:43,384 INFO L93 Difference]: Finished difference Result 76724 states and 120956 transitions. [2020-07-20 23:04:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:43,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 23:04:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:43,449 INFO L225 Difference]: With dead ends: 76724 [2020-07-20 23:04:43,449 INFO L226 Difference]: Without dead ends: 50868 [2020-07-20 23:04:43,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50868 states. [2020-07-20 23:04:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50868 to 50866. [2020-07-20 23:04:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50866 states. [2020-07-20 23:04:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50866 states to 50866 states and 79709 transitions. [2020-07-20 23:04:46,177 INFO L78 Accepts]: Start accepts. Automaton has 50866 states and 79709 transitions. Word has length 330 [2020-07-20 23:04:46,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:46,177 INFO L479 AbstractCegarLoop]: Abstraction has 50866 states and 79709 transitions. [2020-07-20 23:04:46,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 50866 states and 79709 transitions. [2020-07-20 23:04:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 23:04:46,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:46,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:46,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:46,402 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:46,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1327418715, now seen corresponding path program 1 times [2020-07-20 23:04:46,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:46,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756987417] [2020-07-20 23:04:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:46,686 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:04:46,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:46,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:46,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:46,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:46,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756987417] [2020-07-20 23:04:46,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:46,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:46,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264803071] [2020-07-20 23:04:46,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:46,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:46,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:46,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:46,833 INFO L87 Difference]: Start difference. First operand 50866 states and 79709 transitions. Second operand 3 states. [2020-07-20 23:04:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:53,937 INFO L93 Difference]: Finished difference Result 147098 states and 229846 transitions. [2020-07-20 23:04:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:53,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 23:04:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:54,066 INFO L225 Difference]: With dead ends: 147098 [2020-07-20 23:04:54,066 INFO L226 Difference]: Without dead ends: 99404 [2020-07-20 23:04:54,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99404 states. [2020-07-20 23:05:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99404 to 99402. [2020-07-20 23:05:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99402 states. [2020-07-20 23:05:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99402 states to 99402 states and 154874 transitions. [2020-07-20 23:05:01,229 INFO L78 Accepts]: Start accepts. Automaton has 99402 states and 154874 transitions. Word has length 332 [2020-07-20 23:05:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:01,229 INFO L479 AbstractCegarLoop]: Abstraction has 99402 states and 154874 transitions. [2020-07-20 23:05:01,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:05:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 99402 states and 154874 transitions. [2020-07-20 23:05:01,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 23:05:01,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:01,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:01,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:01,500 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:01,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1201758368, now seen corresponding path program 1 times [2020-07-20 23:05:01,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:01,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960607827] [2020-07-20 23:05:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:01,735 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:05:01,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:01,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:05:01,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:02,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:02,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960607827] [2020-07-20 23:05:02,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:02,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:05:02,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863691807] [2020-07-20 23:05:02,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:05:02,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:02,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:05:02,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:02,160 INFO L87 Difference]: Start difference. First operand 99402 states and 154874 transitions. Second operand 3 states. [2020-07-20 23:05:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:13,356 INFO L93 Difference]: Finished difference Result 294873 states and 459009 transitions. [2020-07-20 23:05:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:05:13,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 23:05:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:13,622 INFO L225 Difference]: With dead ends: 294873 [2020-07-20 23:05:13,622 INFO L226 Difference]: Without dead ends: 197167 [2020-07-20 23:05:13,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197167 states. [2020-07-20 23:05:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197167 to 99837. [2020-07-20 23:05:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99837 states. [2020-07-20 23:05:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99837 states to 99837 states and 155394 transitions. [2020-07-20 23:05:23,174 INFO L78 Accepts]: Start accepts. Automaton has 99837 states and 155394 transitions. Word has length 332 [2020-07-20 23:05:23,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:23,175 INFO L479 AbstractCegarLoop]: Abstraction has 99837 states and 155394 transitions. [2020-07-20 23:05:23,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:05:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 99837 states and 155394 transitions. [2020-07-20 23:05:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 23:05:23,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:23,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:23,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:23,425 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:23,426 INFO L82 PathProgramCache]: Analyzing trace with hash 439457696, now seen corresponding path program 1 times [2020-07-20 23:05:23,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:23,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669698512] [2020-07-20 23:05:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:23,686 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:05:23,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:05:23,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:23,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:23,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669698512] [2020-07-20 23:05:23,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:23,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:05:23,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573350055] [2020-07-20 23:05:23,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:05:23,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:23,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:05:23,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:23,759 INFO L87 Difference]: Start difference. First operand 99837 states and 155394 transitions. Second operand 3 states. [2020-07-20 23:05:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:34,382 INFO L93 Difference]: Finished difference Result 296004 states and 460654 transitions. [2020-07-20 23:05:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:05:34,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-20 23:05:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:34,640 INFO L225 Difference]: With dead ends: 296004 [2020-07-20 23:05:34,640 INFO L226 Difference]: Without dead ends: 198287 [2020-07-20 23:05:34,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198287 states. [2020-07-20 23:05:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198287 to 100542. [2020-07-20 23:05:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100542 states. [2020-07-20 23:05:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100542 states to 100542 states and 156372 transitions. [2020-07-20 23:05:45,287 INFO L78 Accepts]: Start accepts. Automaton has 100542 states and 156372 transitions. Word has length 333 [2020-07-20 23:05:45,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:45,288 INFO L479 AbstractCegarLoop]: Abstraction has 100542 states and 156372 transitions. [2020-07-20 23:05:45,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:05:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 100542 states and 156372 transitions. [2020-07-20 23:05:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 23:05:45,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:45,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:45,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:45,534 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2133270230, now seen corresponding path program 1 times [2020-07-20 23:05:45,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:45,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080513258] [2020-07-20 23:05:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:45,792 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:05:45,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:45,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:05:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:45,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:45,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080513258] [2020-07-20 23:05:45,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:45,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:05:45,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606289842] [2020-07-20 23:05:45,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:05:45,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:45,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:05:45,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:05:45,871 INFO L87 Difference]: Start difference. First operand 100542 states and 156372 transitions. Second operand 4 states. [2020-07-20 23:05:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:52,610 INFO L93 Difference]: Finished difference Result 209760 states and 325988 transitions. [2020-07-20 23:05:52,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:05:52,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 23:05:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:52,740 INFO L225 Difference]: With dead ends: 209760 [2020-07-20 23:05:52,740 INFO L226 Difference]: Without dead ends: 107047 [2020-07-20 23:05:52,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:05:52,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107047 states. [2020-07-20 23:05:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107047 to 107045. [2020-07-20 23:05:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107045 states. [2020-07-20 23:05:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107045 states to 107045 states and 165119 transitions. [2020-07-20 23:05:59,677 INFO L78 Accepts]: Start accepts. Automaton has 107045 states and 165119 transitions. Word has length 334 [2020-07-20 23:05:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:59,677 INFO L479 AbstractCegarLoop]: Abstraction has 107045 states and 165119 transitions. [2020-07-20 23:05:59,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:05:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 107045 states and 165119 transitions. [2020-07-20 23:05:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 23:05:59,731 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:59,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:59,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:59,932 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:59,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2028968994, now seen corresponding path program 1 times [2020-07-20 23:05:59,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:59,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401084386] [2020-07-20 23:05:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:00,722 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:06:00,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:06:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:06:00,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:06:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:06:00,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:06:00,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401084386] [2020-07-20 23:06:00,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:06:00,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:06:00,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544152702] [2020-07-20 23:06:00,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:06:00,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:06:00,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:06:00,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:06:00,782 INFO L87 Difference]: Start difference. First operand 107045 states and 165119 transitions. Second operand 3 states. [2020-07-20 23:06:11,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:06:11,970 INFO L93 Difference]: Finished difference Result 244137 states and 378789 transitions. [2020-07-20 23:06:11,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:06:11,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 23:06:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:06:12,162 INFO L225 Difference]: With dead ends: 244137 [2020-07-20 23:06:12,162 INFO L226 Difference]: Without dead ends: 159319 [2020-07-20 23:06:12,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:06:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159319 states. [2020-07-20 23:06:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159319 to 142797. [2020-07-20 23:06:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142797 states. [2020-07-20 23:06:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142797 states to 142797 states and 222251 transitions. [2020-07-20 23:06:21,944 INFO L78 Accepts]: Start accepts. Automaton has 142797 states and 222251 transitions. Word has length 336 [2020-07-20 23:06:21,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:06:21,945 INFO L479 AbstractCegarLoop]: Abstraction has 142797 states and 222251 transitions. [2020-07-20 23:06:21,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:06:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 142797 states and 222251 transitions. [2020-07-20 23:06:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 23:06:21,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:06:21,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:06:22,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:22,196 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:06:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:06:22,197 INFO L82 PathProgramCache]: Analyzing trace with hash 28995228, now seen corresponding path program 1 times [2020-07-20 23:06:22,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:06:22,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110384604] [2020-07-20 23:06:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:22,427 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:06:22,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:06:22,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:06:22,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:06:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:06:22,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:06:22,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110384604] [2020-07-20 23:06:22,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:06:22,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:06:22,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419969] [2020-07-20 23:06:22,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:06:22,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:06:22,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:06:22,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:06:22,922 INFO L87 Difference]: Start difference. First operand 142797 states and 222251 transitions. Second operand 3 states. [2020-07-20 23:06:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:06:42,050 INFO L93 Difference]: Finished difference Result 411723 states and 640754 transitions. [2020-07-20 23:06:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:06:42,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 23:06:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:06:42,421 INFO L225 Difference]: With dead ends: 411723 [2020-07-20 23:06:42,422 INFO L226 Difference]: Without dead ends: 278363 [2020-07-20 23:06:42,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:06:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278363 states. [2020-07-20 23:06:58,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278363 to 143435. [2020-07-20 23:06:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143435 states. [2020-07-20 23:06:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143435 states to 143435 states and 222974 transitions. [2020-07-20 23:06:58,817 INFO L78 Accepts]: Start accepts. Automaton has 143435 states and 222974 transitions. Word has length 336 [2020-07-20 23:06:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:06:58,817 INFO L479 AbstractCegarLoop]: Abstraction has 143435 states and 222974 transitions. [2020-07-20 23:06:58,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:06:58,817 INFO L276 IsEmpty]: Start isEmpty. Operand 143435 states and 222974 transitions. [2020-07-20 23:06:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 23:06:58,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:06:58,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:06:59,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:59,072 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:06:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:06:59,073 INFO L82 PathProgramCache]: Analyzing trace with hash 610046709, now seen corresponding path program 1 times [2020-07-20 23:06:59,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:06:59,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747271421] [2020-07-20 23:06:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:59,305 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:06:59,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:06:59,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:06:59,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:06:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:06:59,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:06:59,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747271421] [2020-07-20 23:06:59,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:06:59,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:06:59,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498196696] [2020-07-20 23:06:59,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:06:59,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:06:59,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:06:59,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:06:59,363 INFO L87 Difference]: Start difference. First operand 143435 states and 222974 transitions. Second operand 4 states. [2020-07-20 23:07:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:07:18,321 INFO L93 Difference]: Finished difference Result 408990 states and 635937 transitions. [2020-07-20 23:07:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:07:18,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-20 23:07:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:07:18,692 INFO L225 Difference]: With dead ends: 408990 [2020-07-20 23:07:18,692 INFO L226 Difference]: Without dead ends: 283044 [2020-07-20 23:07:18,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:07:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283044 states. [2020-07-20 23:07:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283044 to 157578. [2020-07-20 23:07:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157578 states. [2020-07-20 23:07:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157578 states to 157578 states and 245215 transitions. [2020-07-20 23:07:35,778 INFO L78 Accepts]: Start accepts. Automaton has 157578 states and 245215 transitions. Word has length 336 [2020-07-20 23:07:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:07:35,778 INFO L479 AbstractCegarLoop]: Abstraction has 157578 states and 245215 transitions. [2020-07-20 23:07:35,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:07:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 157578 states and 245215 transitions. [2020-07-20 23:07:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 23:07:35,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:07:35,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:07:36,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:07:36,051 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:07:36,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:07:36,052 INFO L82 PathProgramCache]: Analyzing trace with hash -799626286, now seen corresponding path program 1 times [2020-07-20 23:07:36,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:07:36,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196009179] [2020-07-20 23:07:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:07:36,326 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:07:36,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:07:36,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:07:36,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:07:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:07:36,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:07:36,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196009179] [2020-07-20 23:07:36,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:07:36,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:07:36,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394396120] [2020-07-20 23:07:36,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:07:36,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:07:36,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:07:36,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:07:36,423 INFO L87 Difference]: Start difference. First operand 157578 states and 245215 transitions. Second operand 3 states. [2020-07-20 23:08:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:01,201 INFO L93 Difference]: Finished difference Result 420127 states and 652832 transitions. [2020-07-20 23:08:01,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:08:01,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 23:08:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:01,634 INFO L225 Difference]: With dead ends: 420127 [2020-07-20 23:08:01,635 INFO L226 Difference]: Without dead ends: 290049 [2020-07-20 23:08:01,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290049 states. [2020-07-20 23:08:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290049 to 290047. [2020-07-20 23:08:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290047 states. [2020-07-20 23:08:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290047 states to 290047 states and 448792 transitions. [2020-07-20 23:08:28,239 INFO L78 Accepts]: Start accepts. Automaton has 290047 states and 448792 transitions. Word has length 336 [2020-07-20 23:08:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:28,240 INFO L479 AbstractCegarLoop]: Abstraction has 290047 states and 448792 transitions. [2020-07-20 23:08:28,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:08:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 290047 states and 448792 transitions. [2020-07-20 23:08:28,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 23:08:28,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:28,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:08:28,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:28,560 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:28,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1033747647, now seen corresponding path program 1 times [2020-07-20 23:08:28,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:28,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626646250] [2020-07-20 23:08:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:28,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:08:28,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:08:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:08:28,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:28,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626646250] [2020-07-20 23:08:28,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:28,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 23:08:28,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334759063] [2020-07-20 23:08:28,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 23:08:28,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 23:08:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 23:08:28,912 INFO L87 Difference]: Start difference. First operand 290047 states and 448792 transitions. Second operand 9 states. [2020-07-20 23:11:52,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:52,943 INFO L93 Difference]: Finished difference Result 2008183 states and 3155678 transitions. [2020-07-20 23:11:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 23:11:52,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 338 [2020-07-20 23:11:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:56,013 INFO L225 Difference]: With dead ends: 2008183 [2020-07-20 23:11:56,013 INFO L226 Difference]: Without dead ends: 1903401 [2020-07-20 23:11:56,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 23:11:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903401 states. [2020-07-20 23:13:26,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903401 to 558641. [2020-07-20 23:13:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558641 states. [2020-07-20 23:13:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558641 states to 558641 states and 869900 transitions. [2020-07-20 23:13:27,049 INFO L78 Accepts]: Start accepts. Automaton has 558641 states and 869900 transitions. Word has length 338 [2020-07-20 23:13:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:13:27,050 INFO L479 AbstractCegarLoop]: Abstraction has 558641 states and 869900 transitions. [2020-07-20 23:13:27,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 23:13:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 558641 states and 869900 transitions. [2020-07-20 23:13:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 23:13:27,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:13:27,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:13:27,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:13:27,435 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:13:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:13:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1323471307, now seen corresponding path program 1 times [2020-07-20 23:13:27,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:13:27,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322046737] [2020-07-20 23:13:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:13:28,328 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:13:28,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:13:28,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:13:28,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:13:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:13:28,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:13:28,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322046737] [2020-07-20 23:13:28,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:13:28,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:13:28,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721767130] [2020-07-20 23:13:28,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:13:28,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:13:28,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:13:28,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:13:28,414 INFO L87 Difference]: Start difference. First operand 558641 states and 869900 transitions. Second operand 3 states.