/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:18:36,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:18:36,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:18:36,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:18:36,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:18:36,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:18:36,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:18:36,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:18:36,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:18:36,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:18:36,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:18:36,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:18:36,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:18:36,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:18:36,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:18:36,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:18:36,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:18:36,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:18:36,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:18:36,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:18:36,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:18:36,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:18:36,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:18:36,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:18:36,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:18:36,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 02:18:36,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 02:18:36,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 02:18:36,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 02:18:36,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 02:18:36,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 02:18:36,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 02:18:36,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 02:18:36,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:18:36,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:18:36,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:18:36,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 02:18:36,803 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:18:36,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:18:36,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:18:36,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:18:36,805 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:18:36,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:18:36,805 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:18:36,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:18:36,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:18:36,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:18:36,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:18:36,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:18:36,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:18:36,807 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:18:36,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:18:36,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:18:36,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:18:36,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:18:36,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:18:36,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:18:36,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:18:36,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:18:36,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:18:36,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:18:36,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:18:36,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:18:36,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:36,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:18:36,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:18:36,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 02:18:37,105 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:18:37,119 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:18:37,122 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:18:37,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:18:37,124 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:18:37,125 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:18:37,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f30a357d6/a0b31051602147c18e33edb1fc7ba4ec/FLAGeb2b1f7ae [2020-07-21 02:18:38,049 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:18:38,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:18:38,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f30a357d6/a0b31051602147c18e33edb1fc7ba4ec/FLAGeb2b1f7ae [2020-07-21 02:18:38,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f30a357d6/a0b31051602147c18e33edb1fc7ba4ec [2020-07-21 02:18:38,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:18:38,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:18:38,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:18:38,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:18:38,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:18:38,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:18:38" (1/1) ... [2020-07-21 02:18:38,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3859f6d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:38, skipping insertion in model container [2020-07-21 02:18:38,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:18:38" (1/1) ... [2020-07-21 02:18:38,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:18:38,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:18:39,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:18:39,801 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:18:40,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:18:40,933 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:18:40,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:40 WrapperNode [2020-07-21 02:18:40,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:18:40,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:18:40,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:18:40,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:18:40,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:40" (1/1) ... [2020-07-21 02:18:40,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:40" (1/1) ... [2020-07-21 02:18:41,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:40" (1/1) ... [2020-07-21 02:18:41,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:40" (1/1) ... [2020-07-21 02:18:41,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:40" (1/1) ... [2020-07-21 02:18:41,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:40" (1/1) ... [2020-07-21 02:18:41,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:40" (1/1) ... [2020-07-21 02:18:41,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:18:41,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:18:41,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:18:41,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:18:41,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:18:41,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:18:41,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:18:41,222 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:18:41,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:18:41,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:18:41,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:18:41,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 02:18:41,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:18:41,223 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:18:41,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:18:41,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:18:41,224 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:18:41,224 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:18:41,225 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:18:41,225 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:18:41,225 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:18:41,225 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:18:41,226 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 02:18:41,226 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:18:41,226 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:18:41,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:18:41,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:18:41,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:18:45,239 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:18:45,239 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:18:45,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:18:45 BoogieIcfgContainer [2020-07-21 02:18:45,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:18:45,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:18:45,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:18:45,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:18:45,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:18:38" (1/3) ... [2020-07-21 02:18:45,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755ee853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:18:45, skipping insertion in model container [2020-07-21 02:18:45,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:40" (2/3) ... [2020-07-21 02:18:45,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755ee853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:18:45, skipping insertion in model container [2020-07-21 02:18:45,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:18:45" (3/3) ... [2020-07-21 02:18:45,260 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:18:45,271 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:18:45,280 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:18:45,295 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:18:45,326 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:18:45,327 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:18:45,327 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:18:45,327 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:18:45,327 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:18:45,327 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:18:45,327 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:18:45,327 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:18:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-07-21 02:18:45,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 02:18:45,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:45,416 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:45,416 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:45,423 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-07-21 02:18:45,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:45,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218238322] [2020-07-21 02:18:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:46,045 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:46,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 2026 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:18:46,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:46,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:46,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218238322] [2020-07-21 02:18:46,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:46,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:18:46,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606625754] [2020-07-21 02:18:46,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:18:46,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:18:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:18:46,553 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2020-07-21 02:18:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:47,062 INFO L93 Difference]: Finished difference Result 3962 states and 7141 transitions. [2020-07-21 02:18:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:18:47,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-21 02:18:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:47,097 INFO L225 Difference]: With dead ends: 3962 [2020-07-21 02:18:47,097 INFO L226 Difference]: Without dead ends: 2633 [2020-07-21 02:18:47,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:18:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2020-07-21 02:18:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2631. [2020-07-21 02:18:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2631 states. [2020-07-21 02:18:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 4309 transitions. [2020-07-21 02:18:47,293 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 4309 transitions. Word has length 476 [2020-07-21 02:18:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:47,295 INFO L479 AbstractCegarLoop]: Abstraction has 2631 states and 4309 transitions. [2020-07-21 02:18:47,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:18:47,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 4309 transitions. [2020-07-21 02:18:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 02:18:47,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:47,311 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:47,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:47,525 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:47,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:47,526 INFO L82 PathProgramCache]: Analyzing trace with hash 627814464, now seen corresponding path program 1 times [2020-07-21 02:18:47,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:47,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546660431] [2020-07-21 02:18:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:47,970 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:47,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:47,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:47,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:48,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:48,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546660431] [2020-07-21 02:18:48,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:48,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:48,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700471872] [2020-07-21 02:18:48,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:48,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:48,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:48,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:48,271 INFO L87 Difference]: Start difference. First operand 2631 states and 4309 transitions. Second operand 3 states. [2020-07-21 02:18:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:48,612 INFO L93 Difference]: Finished difference Result 7643 states and 12488 transitions. [2020-07-21 02:18:48,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:48,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 02:18:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:48,643 INFO L225 Difference]: With dead ends: 7643 [2020-07-21 02:18:48,643 INFO L226 Difference]: Without dead ends: 5175 [2020-07-21 02:18:48,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:48,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5175 states. [2020-07-21 02:18:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5175 to 5173. [2020-07-21 02:18:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5173 states. [2020-07-21 02:18:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5173 states to 5173 states and 8441 transitions. [2020-07-21 02:18:49,051 INFO L78 Accepts]: Start accepts. Automaton has 5173 states and 8441 transitions. Word has length 478 [2020-07-21 02:18:49,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:49,052 INFO L479 AbstractCegarLoop]: Abstraction has 5173 states and 8441 transitions. [2020-07-21 02:18:49,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5173 states and 8441 transitions. [2020-07-21 02:18:49,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 02:18:49,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:49,073 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:49,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:49,288 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:49,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:49,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1435918110, now seen corresponding path program 1 times [2020-07-21 02:18:49,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:49,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293849705] [2020-07-21 02:18:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:49,637 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:49,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:49,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:49,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:49,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:49,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293849705] [2020-07-21 02:18:49,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:49,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:49,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535157496] [2020-07-21 02:18:49,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:49,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:49,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:49,794 INFO L87 Difference]: Start difference. First operand 5173 states and 8441 transitions. Second operand 3 states. [2020-07-21 02:18:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:50,185 INFO L93 Difference]: Finished difference Result 15352 states and 25024 transitions. [2020-07-21 02:18:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:50,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 02:18:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:50,234 INFO L225 Difference]: With dead ends: 15352 [2020-07-21 02:18:50,234 INFO L226 Difference]: Without dead ends: 10203 [2020-07-21 02:18:50,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2020-07-21 02:18:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 5198. [2020-07-21 02:18:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5198 states. [2020-07-21 02:18:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5198 states to 5198 states and 8479 transitions. [2020-07-21 02:18:50,580 INFO L78 Accepts]: Start accepts. Automaton has 5198 states and 8479 transitions. Word has length 479 [2020-07-21 02:18:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:50,581 INFO L479 AbstractCegarLoop]: Abstraction has 5198 states and 8479 transitions. [2020-07-21 02:18:50,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5198 states and 8479 transitions. [2020-07-21 02:18:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 02:18:50,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:50,610 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:50,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:50,825 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:50,825 INFO L82 PathProgramCache]: Analyzing trace with hash 243773179, now seen corresponding path program 1 times [2020-07-21 02:18:50,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:50,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282172305] [2020-07-21 02:18:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:51,161 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:51,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:51,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:18:51,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:51,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:51,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282172305] [2020-07-21 02:18:51,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:51,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:18:51,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409772197] [2020-07-21 02:18:51,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:18:51,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:51,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:18:51,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:18:51,352 INFO L87 Difference]: Start difference. First operand 5198 states and 8479 transitions. Second operand 4 states. [2020-07-21 02:18:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:51,900 INFO L93 Difference]: Finished difference Result 12409 states and 20445 transitions. [2020-07-21 02:18:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:18:51,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-21 02:18:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:51,933 INFO L225 Difference]: With dead ends: 12409 [2020-07-21 02:18:51,934 INFO L226 Difference]: Without dead ends: 6263 [2020-07-21 02:18:51,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:18:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6263 states. [2020-07-21 02:18:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6263 to 6261. [2020-07-21 02:18:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6261 states. [2020-07-21 02:18:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6261 states to 6261 states and 10281 transitions. [2020-07-21 02:18:52,211 INFO L78 Accepts]: Start accepts. Automaton has 6261 states and 10281 transitions. Word has length 480 [2020-07-21 02:18:52,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:52,212 INFO L479 AbstractCegarLoop]: Abstraction has 6261 states and 10281 transitions. [2020-07-21 02:18:52,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:18:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 6261 states and 10281 transitions. [2020-07-21 02:18:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 02:18:52,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:52,235 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:52,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:52,449 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:52,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1498996073, now seen corresponding path program 1 times [2020-07-21 02:18:52,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:52,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860708560] [2020-07-21 02:18:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:53,022 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:53,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:53,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:53,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:53,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:53,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860708560] [2020-07-21 02:18:53,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:53,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:53,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102166136] [2020-07-21 02:18:53,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:53,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:53,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:53,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:53,292 INFO L87 Difference]: Start difference. First operand 6261 states and 10281 transitions. Second operand 3 states. [2020-07-21 02:18:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:53,754 INFO L93 Difference]: Finished difference Result 18148 states and 29728 transitions. [2020-07-21 02:18:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:53,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 02:18:53,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:53,786 INFO L225 Difference]: With dead ends: 18148 [2020-07-21 02:18:53,786 INFO L226 Difference]: Without dead ends: 12418 [2020-07-21 02:18:53,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:53,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12418 states. [2020-07-21 02:18:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12418 to 12416. [2020-07-21 02:18:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12416 states. [2020-07-21 02:18:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12416 states to 12416 states and 20316 transitions. [2020-07-21 02:18:54,866 INFO L78 Accepts]: Start accepts. Automaton has 12416 states and 20316 transitions. Word has length 481 [2020-07-21 02:18:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:54,867 INFO L479 AbstractCegarLoop]: Abstraction has 12416 states and 20316 transitions. [2020-07-21 02:18:54,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 12416 states and 20316 transitions. [2020-07-21 02:18:54,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 02:18:54,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:54,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:55,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:55,115 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:55,116 INFO L82 PathProgramCache]: Analyzing trace with hash -510314348, now seen corresponding path program 1 times [2020-07-21 02:18:55,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:55,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345885353] [2020-07-21 02:18:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:55,513 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:55,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:55,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:55,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:55,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:55,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345885353] [2020-07-21 02:18:55,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:55,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:55,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773043861] [2020-07-21 02:18:55,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:55,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:55,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:55,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:55,778 INFO L87 Difference]: Start difference. First operand 12416 states and 20316 transitions. Second operand 3 states. [2020-07-21 02:18:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:56,585 INFO L93 Difference]: Finished difference Result 37088 states and 60680 transitions. [2020-07-21 02:18:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:56,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 02:18:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:56,652 INFO L225 Difference]: With dead ends: 37088 [2020-07-21 02:18:56,652 INFO L226 Difference]: Without dead ends: 24762 [2020-07-21 02:18:56,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:56,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24762 states. [2020-07-21 02:18:57,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24762 to 12494. [2020-07-21 02:18:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12494 states. [2020-07-21 02:18:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12494 states to 12494 states and 20436 transitions. [2020-07-21 02:18:57,296 INFO L78 Accepts]: Start accepts. Automaton has 12494 states and 20436 transitions. Word has length 482 [2020-07-21 02:18:57,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:57,296 INFO L479 AbstractCegarLoop]: Abstraction has 12494 states and 20436 transitions. [2020-07-21 02:18:57,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 12494 states and 20436 transitions. [2020-07-21 02:18:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 02:18:57,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:57,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:57,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:57,630 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:57,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash -591903806, now seen corresponding path program 1 times [2020-07-21 02:18:57,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:57,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064956384] [2020-07-21 02:18:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:57,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:57,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:57,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:57,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:58,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:58,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064956384] [2020-07-21 02:18:58,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:58,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:58,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104158436] [2020-07-21 02:18:58,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:58,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:58,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:58,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:58,078 INFO L87 Difference]: Start difference. First operand 12494 states and 20436 transitions. Second operand 3 states. [2020-07-21 02:18:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:58,716 INFO L93 Difference]: Finished difference Result 36734 states and 60028 transitions. [2020-07-21 02:18:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:58,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 02:18:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:58,780 INFO L225 Difference]: With dead ends: 36734 [2020-07-21 02:18:58,781 INFO L226 Difference]: Without dead ends: 24620 [2020-07-21 02:18:58,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24620 states. [2020-07-21 02:18:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24620 to 12646. [2020-07-21 02:18:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12646 states. [2020-07-21 02:18:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12646 states to 12646 states and 20660 transitions. [2020-07-21 02:18:59,355 INFO L78 Accepts]: Start accepts. Automaton has 12646 states and 20660 transitions. Word has length 483 [2020-07-21 02:18:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:59,356 INFO L479 AbstractCegarLoop]: Abstraction has 12646 states and 20660 transitions. [2020-07-21 02:18:59,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 12646 states and 20660 transitions. [2020-07-21 02:18:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 02:18:59,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:59,385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:59,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:59,601 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1577617943, now seen corresponding path program 1 times [2020-07-21 02:18:59,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:59,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046758314] [2020-07-21 02:18:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:59,940 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:59,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:59,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:00,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:00,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046758314] [2020-07-21 02:19:00,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:00,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:00,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356660514] [2020-07-21 02:19:00,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:00,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:00,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:00,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:00,099 INFO L87 Difference]: Start difference. First operand 12646 states and 20660 transitions. Second operand 3 states. [2020-07-21 02:19:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:00,617 INFO L93 Difference]: Finished difference Result 37433 states and 61125 transitions. [2020-07-21 02:19:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:00,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 02:19:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:00,664 INFO L225 Difference]: With dead ends: 37433 [2020-07-21 02:19:00,664 INFO L226 Difference]: Without dead ends: 25008 [2020-07-21 02:19:00,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:00,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25008 states. [2020-07-21 02:19:01,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25008 to 12742. [2020-07-21 02:19:01,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12742 states. [2020-07-21 02:19:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12742 states to 12742 states and 20781 transitions. [2020-07-21 02:19:01,226 INFO L78 Accepts]: Start accepts. Automaton has 12742 states and 20781 transitions. Word has length 483 [2020-07-21 02:19:01,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:01,227 INFO L479 AbstractCegarLoop]: Abstraction has 12742 states and 20781 transitions. [2020-07-21 02:19:01,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 12742 states and 20781 transitions. [2020-07-21 02:19:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 02:19:01,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:01,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:01,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:01,454 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:01,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1705621311, now seen corresponding path program 1 times [2020-07-21 02:19:01,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:01,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901463556] [2020-07-21 02:19:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:02,345 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:02,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:02,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:02,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:02,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:02,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901463556] [2020-07-21 02:19:02,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:02,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:02,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913645878] [2020-07-21 02:19:02,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:02,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:02,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:02,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:02,686 INFO L87 Difference]: Start difference. First operand 12742 states and 20781 transitions. Second operand 3 states. [2020-07-21 02:19:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:03,684 INFO L93 Difference]: Finished difference Result 35984 states and 58565 transitions. [2020-07-21 02:19:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:03,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 02:19:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:03,728 INFO L225 Difference]: With dead ends: 35984 [2020-07-21 02:19:03,728 INFO L226 Difference]: Without dead ends: 24776 [2020-07-21 02:19:03,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24776 states. [2020-07-21 02:19:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24776 to 24774. [2020-07-21 02:19:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24774 states. [2020-07-21 02:19:04,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24774 states to 24774 states and 40275 transitions. [2020-07-21 02:19:04,671 INFO L78 Accepts]: Start accepts. Automaton has 24774 states and 40275 transitions. Word has length 484 [2020-07-21 02:19:04,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:04,672 INFO L479 AbstractCegarLoop]: Abstraction has 24774 states and 40275 transitions. [2020-07-21 02:19:04,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:04,672 INFO L276 IsEmpty]: Start isEmpty. Operand 24774 states and 40275 transitions. [2020-07-21 02:19:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 02:19:04,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:04,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:04,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:04,895 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash -592104494, now seen corresponding path program 1 times [2020-07-21 02:19:04,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:04,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293951207] [2020-07-21 02:19:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:05,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:05,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1660 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:05,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:05,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293951207] [2020-07-21 02:19:05,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:05,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:05,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434215280] [2020-07-21 02:19:05,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:05,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:05,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:05,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:05,412 INFO L87 Difference]: Start difference. First operand 24774 states and 40275 transitions. Second operand 3 states. [2020-07-21 02:19:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:06,689 INFO L93 Difference]: Finished difference Result 72103 states and 117017 transitions. [2020-07-21 02:19:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:06,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 02:19:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:06,752 INFO L225 Difference]: With dead ends: 72103 [2020-07-21 02:19:06,753 INFO L226 Difference]: Without dead ends: 47503 [2020-07-21 02:19:06,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47503 states. [2020-07-21 02:19:07,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47503 to 24695. [2020-07-21 02:19:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24695 states. [2020-07-21 02:19:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24695 states to 24695 states and 40136 transitions. [2020-07-21 02:19:08,001 INFO L78 Accepts]: Start accepts. Automaton has 24695 states and 40136 transitions. Word has length 485 [2020-07-21 02:19:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:08,001 INFO L479 AbstractCegarLoop]: Abstraction has 24695 states and 40136 transitions. [2020-07-21 02:19:08,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 24695 states and 40136 transitions. [2020-07-21 02:19:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 02:19:08,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:08,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:08,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:08,238 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:08,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1841843359, now seen corresponding path program 1 times [2020-07-21 02:19:08,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:08,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556717878] [2020-07-21 02:19:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:08,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:08,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:08,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:08,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:08,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:08,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556717878] [2020-07-21 02:19:08,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:08,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:08,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548601665] [2020-07-21 02:19:08,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:08,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:08,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:08,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:08,698 INFO L87 Difference]: Start difference. First operand 24695 states and 40136 transitions. Second operand 3 states. [2020-07-21 02:19:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:10,693 INFO L93 Difference]: Finished difference Result 72879 states and 118464 transitions. [2020-07-21 02:19:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:10,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 02:19:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:10,747 INFO L225 Difference]: With dead ends: 72879 [2020-07-21 02:19:10,747 INFO L226 Difference]: Without dead ends: 48729 [2020-07-21 02:19:10,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48729 states. [2020-07-21 02:19:11,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48729 to 25095. [2020-07-21 02:19:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25095 states. [2020-07-21 02:19:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25095 states to 25095 states and 40716 transitions. [2020-07-21 02:19:11,880 INFO L78 Accepts]: Start accepts. Automaton has 25095 states and 40716 transitions. Word has length 486 [2020-07-21 02:19:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:11,880 INFO L479 AbstractCegarLoop]: Abstraction has 25095 states and 40716 transitions. [2020-07-21 02:19:11,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 25095 states and 40716 transitions. [2020-07-21 02:19:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 02:19:11,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:11,909 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:12,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:12,123 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:12,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1937559181, now seen corresponding path program 1 times [2020-07-21 02:19:12,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:12,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130049647] [2020-07-21 02:19:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:12,465 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:12,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:12,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:19:12,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:12,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:12,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130049647] [2020-07-21 02:19:12,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:12,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:12,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557370524] [2020-07-21 02:19:12,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:12,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:12,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:12,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:12,576 INFO L87 Difference]: Start difference. First operand 25095 states and 40716 transitions. Second operand 4 states. [2020-07-21 02:19:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:14,251 INFO L93 Difference]: Finished difference Result 60772 states and 99459 transitions. [2020-07-21 02:19:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:19:14,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-21 02:19:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:14,283 INFO L225 Difference]: With dead ends: 60772 [2020-07-21 02:19:14,283 INFO L226 Difference]: Without dead ends: 31208 [2020-07-21 02:19:14,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:19:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31208 states. [2020-07-21 02:19:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31208 to 31206. [2020-07-21 02:19:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31206 states. [2020-07-21 02:19:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31206 states to 31206 states and 50772 transitions. [2020-07-21 02:19:15,402 INFO L78 Accepts]: Start accepts. Automaton has 31206 states and 50772 transitions. Word has length 486 [2020-07-21 02:19:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:15,402 INFO L479 AbstractCegarLoop]: Abstraction has 31206 states and 50772 transitions. [2020-07-21 02:19:15,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 31206 states and 50772 transitions. [2020-07-21 02:19:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 02:19:15,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:15,429 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:15,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:15,634 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:15,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:15,635 INFO L82 PathProgramCache]: Analyzing trace with hash -942148744, now seen corresponding path program 1 times [2020-07-21 02:19:15,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:15,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420160677] [2020-07-21 02:19:15,636 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:15,980 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:15,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:15,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:16,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:16,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:16,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420160677] [2020-07-21 02:19:16,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:16,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:16,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531443116] [2020-07-21 02:19:16,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:16,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:16,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:16,283 INFO L87 Difference]: Start difference. First operand 31206 states and 50772 transitions. Second operand 3 states. [2020-07-21 02:19:19,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:19,318 INFO L93 Difference]: Finished difference Result 91063 states and 148260 transitions. [2020-07-21 02:19:19,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:19,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 02:19:19,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:19,384 INFO L225 Difference]: With dead ends: 91063 [2020-07-21 02:19:19,384 INFO L226 Difference]: Without dead ends: 61207 [2020-07-21 02:19:19,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61207 states. [2020-07-21 02:19:20,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61207 to 32019. [2020-07-21 02:19:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32019 states. [2020-07-21 02:19:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32019 states to 32019 states and 51814 transitions. [2020-07-21 02:19:20,681 INFO L78 Accepts]: Start accepts. Automaton has 32019 states and 51814 transitions. Word has length 487 [2020-07-21 02:19:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:20,681 INFO L479 AbstractCegarLoop]: Abstraction has 32019 states and 51814 transitions. [2020-07-21 02:19:20,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 32019 states and 51814 transitions. [2020-07-21 02:19:20,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 02:19:20,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:20,709 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:20,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:20,910 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:20,911 INFO L82 PathProgramCache]: Analyzing trace with hash 185562071, now seen corresponding path program 1 times [2020-07-21 02:19:20,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:20,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395514388] [2020-07-21 02:19:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:21,254 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:21,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:21,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:21,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:21,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:21,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395514388] [2020-07-21 02:19:21,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:21,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:21,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383934476] [2020-07-21 02:19:21,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:21,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:21,368 INFO L87 Difference]: Start difference. First operand 32019 states and 51814 transitions. Second operand 3 states. [2020-07-21 02:19:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:23,489 INFO L93 Difference]: Finished difference Result 88993 states and 144112 transitions. [2020-07-21 02:19:23,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:23,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 02:19:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:23,573 INFO L225 Difference]: With dead ends: 88993 [2020-07-21 02:19:23,573 INFO L226 Difference]: Without dead ends: 57319 [2020-07-21 02:19:23,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:23,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57319 states. [2020-07-21 02:19:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57319 to 31487. [2020-07-21 02:19:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31487 states. [2020-07-21 02:19:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31487 states to 31487 states and 51022 transitions. [2020-07-21 02:19:25,399 INFO L78 Accepts]: Start accepts. Automaton has 31487 states and 51022 transitions. Word has length 487 [2020-07-21 02:19:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:25,400 INFO L479 AbstractCegarLoop]: Abstraction has 31487 states and 51022 transitions. [2020-07-21 02:19:25,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 31487 states and 51022 transitions. [2020-07-21 02:19:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 02:19:25,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:25,426 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:25,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:25,627 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:25,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1590945355, now seen corresponding path program 1 times [2020-07-21 02:19:25,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:25,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954905077] [2020-07-21 02:19:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:26,031 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:26,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:26,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 2038 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:19:26,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:26,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:26,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954905077] [2020-07-21 02:19:26,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:26,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:26,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994722521] [2020-07-21 02:19:26,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:26,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:26,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:26,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:26,219 INFO L87 Difference]: Start difference. First operand 31487 states and 51022 transitions. Second operand 4 states. [2020-07-21 02:19:28,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:28,414 INFO L93 Difference]: Finished difference Result 42795 states and 69222 transitions. [2020-07-21 02:19:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:19:28,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 02:19:28,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:28,444 INFO L225 Difference]: With dead ends: 42795 [2020-07-21 02:19:28,445 INFO L226 Difference]: Without dead ends: 31505 [2020-07-21 02:19:28,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:19:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31505 states. [2020-07-21 02:19:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31505 to 25721. [2020-07-21 02:19:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25721 states. [2020-07-21 02:19:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25721 states to 25721 states and 41195 transitions. [2020-07-21 02:19:29,560 INFO L78 Accepts]: Start accepts. Automaton has 25721 states and 41195 transitions. Word has length 488 [2020-07-21 02:19:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:29,561 INFO L479 AbstractCegarLoop]: Abstraction has 25721 states and 41195 transitions. [2020-07-21 02:19:29,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 25721 states and 41195 transitions. [2020-07-21 02:19:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 02:19:29,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:29,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:29,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:29,783 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1202132142, now seen corresponding path program 1 times [2020-07-21 02:19:29,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:29,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250087029] [2020-07-21 02:19:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:30,133 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:30,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:30,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:19:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:30,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:30,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250087029] [2020-07-21 02:19:30,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:30,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:30,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220009582] [2020-07-21 02:19:30,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:30,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:30,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:30,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:30,306 INFO L87 Difference]: Start difference. First operand 25721 states and 41195 transitions. Second operand 4 states. [2020-07-21 02:19:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:32,779 INFO L93 Difference]: Finished difference Result 69305 states and 111126 transitions. [2020-07-21 02:19:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:19:32,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 02:19:32,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:32,828 INFO L225 Difference]: With dead ends: 69305 [2020-07-21 02:19:32,829 INFO L226 Difference]: Without dead ends: 46615 [2020-07-21 02:19:32,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:19:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46615 states. [2020-07-21 02:19:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46615 to 46613. [2020-07-21 02:19:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46613 states. [2020-07-21 02:19:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46613 states to 46613 states and 74277 transitions. [2020-07-21 02:19:35,202 INFO L78 Accepts]: Start accepts. Automaton has 46613 states and 74277 transitions. Word has length 488 [2020-07-21 02:19:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:35,202 INFO L479 AbstractCegarLoop]: Abstraction has 46613 states and 74277 transitions. [2020-07-21 02:19:35,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 46613 states and 74277 transitions. [2020-07-21 02:19:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 02:19:35,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:35,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:35,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:35,438 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:35,439 INFO L82 PathProgramCache]: Analyzing trace with hash 360500243, now seen corresponding path program 1 times [2020-07-21 02:19:35,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:35,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631539427] [2020-07-21 02:19:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:35,779 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:35,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:35,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:35,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:35,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:35,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631539427] [2020-07-21 02:19:35,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:35,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:35,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453273042] [2020-07-21 02:19:35,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:35,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:35,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:35,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:35,899 INFO L87 Difference]: Start difference. First operand 46613 states and 74277 transitions. Second operand 3 states. [2020-07-21 02:19:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:41,394 INFO L93 Difference]: Finished difference Result 133647 states and 213429 transitions. [2020-07-21 02:19:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:41,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 02:19:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:41,485 INFO L225 Difference]: With dead ends: 133647 [2020-07-21 02:19:41,486 INFO L226 Difference]: Without dead ends: 90097 [2020-07-21 02:19:41,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90097 states. [2020-07-21 02:19:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90097 to 46918. [2020-07-21 02:19:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46918 states. [2020-07-21 02:19:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46918 states to 46918 states and 74694 transitions. [2020-07-21 02:19:44,179 INFO L78 Accepts]: Start accepts. Automaton has 46918 states and 74694 transitions. Word has length 489 [2020-07-21 02:19:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:44,179 INFO L479 AbstractCegarLoop]: Abstraction has 46918 states and 74694 transitions. [2020-07-21 02:19:44,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 46918 states and 74694 transitions. [2020-07-21 02:19:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 02:19:44,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:44,228 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:44,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:44,429 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:44,430 INFO L82 PathProgramCache]: Analyzing trace with hash 546830444, now seen corresponding path program 1 times [2020-07-21 02:19:44,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:44,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023973695] [2020-07-21 02:19:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:44,821 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:44,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:44,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 2041 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:44,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:45,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:45,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023973695] [2020-07-21 02:19:45,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:45,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:45,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247722406] [2020-07-21 02:19:45,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:45,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:45,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:45,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:45,008 INFO L87 Difference]: Start difference. First operand 46918 states and 74694 transitions. Second operand 3 states. [2020-07-21 02:19:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:47,838 INFO L93 Difference]: Finished difference Result 75375 states and 120671 transitions. [2020-07-21 02:19:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:47,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 02:19:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:47,894 INFO L225 Difference]: With dead ends: 75375 [2020-07-21 02:19:47,895 INFO L226 Difference]: Without dead ends: 55469 [2020-07-21 02:19:47,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55469 states. [2020-07-21 02:19:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55469 to 55467. [2020-07-21 02:19:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55467 states. [2020-07-21 02:19:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55467 states to 55467 states and 88920 transitions. [2020-07-21 02:19:50,852 INFO L78 Accepts]: Start accepts. Automaton has 55467 states and 88920 transitions. Word has length 490 [2020-07-21 02:19:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:50,852 INFO L479 AbstractCegarLoop]: Abstraction has 55467 states and 88920 transitions. [2020-07-21 02:19:50,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 55467 states and 88920 transitions. [2020-07-21 02:19:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 02:19:50,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:50,898 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:51,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:51,099 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2087710967, now seen corresponding path program 1 times [2020-07-21 02:19:51,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:51,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829400312] [2020-07-21 02:19:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:51,445 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:51,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:51,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:19:51,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:51,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:51,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829400312] [2020-07-21 02:19:51,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:51,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:51,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966110810] [2020-07-21 02:19:51,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:51,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:51,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:51,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:51,556 INFO L87 Difference]: Start difference. First operand 55467 states and 88920 transitions. Second operand 4 states. [2020-07-21 02:19:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:56,764 INFO L93 Difference]: Finished difference Result 133790 states and 216551 transitions. [2020-07-21 02:19:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:19:56,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-21 02:19:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:56,838 INFO L225 Difference]: With dead ends: 133790 [2020-07-21 02:19:56,838 INFO L226 Difference]: Without dead ends: 71383 [2020-07-21 02:19:56,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:19:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71383 states. [2020-07-21 02:20:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71383 to 71381. [2020-07-21 02:20:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71381 states. [2020-07-21 02:20:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71381 states to 71381 states and 115090 transitions. [2020-07-21 02:20:01,030 INFO L78 Accepts]: Start accepts. Automaton has 71381 states and 115090 transitions. Word has length 490 [2020-07-21 02:20:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:01,031 INFO L479 AbstractCegarLoop]: Abstraction has 71381 states and 115090 transitions. [2020-07-21 02:20:01,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 71381 states and 115090 transitions. [2020-07-21 02:20:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 02:20:01,085 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:01,085 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:01,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:01,297 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash 125097927, now seen corresponding path program 1 times [2020-07-21 02:20:01,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:01,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365886046] [2020-07-21 02:20:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:01,628 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:01,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:01,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:01,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:01,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:01,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365886046] [2020-07-21 02:20:01,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:01,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:01,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797914507] [2020-07-21 02:20:01,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:01,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:01,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:01,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:01,743 INFO L87 Difference]: Start difference. First operand 71381 states and 115090 transitions. Second operand 4 states. [2020-07-21 02:20:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:06,604 INFO L93 Difference]: Finished difference Result 96200 states and 154628 transitions. [2020-07-21 02:20:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:20:06,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-21 02:20:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:06,678 INFO L225 Difference]: With dead ends: 96200 [2020-07-21 02:20:06,678 INFO L226 Difference]: Without dead ends: 70968 [2020-07-21 02:20:06,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:20:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70968 states. [2020-07-21 02:20:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70968 to 58003. [2020-07-21 02:20:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58003 states. [2020-07-21 02:20:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58003 states to 58003 states and 92371 transitions. [2020-07-21 02:20:09,996 INFO L78 Accepts]: Start accepts. Automaton has 58003 states and 92371 transitions. Word has length 492 [2020-07-21 02:20:09,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:09,996 INFO L479 AbstractCegarLoop]: Abstraction has 58003 states and 92371 transitions. [2020-07-21 02:20:09,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:20:09,996 INFO L276 IsEmpty]: Start isEmpty. Operand 58003 states and 92371 transitions. [2020-07-21 02:20:10,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 02:20:10,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:10,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:10,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:10,245 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:10,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1654885340, now seen corresponding path program 1 times [2020-07-21 02:20:10,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:10,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884630223] [2020-07-21 02:20:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:10,649 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:20:10,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:10,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:10,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:11,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:11,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884630223] [2020-07-21 02:20:11,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:11,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:11,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438631102] [2020-07-21 02:20:11,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:11,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:11,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:11,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:11,098 INFO L87 Difference]: Start difference. First operand 58003 states and 92371 transitions. Second operand 3 states. [2020-07-21 02:20:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:17,089 INFO L93 Difference]: Finished difference Result 161575 states and 257480 transitions. [2020-07-21 02:20:17,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:17,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 02:20:17,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:17,216 INFO L225 Difference]: With dead ends: 161575 [2020-07-21 02:20:17,216 INFO L226 Difference]: Without dead ends: 110731 [2020-07-21 02:20:17,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110731 states. [2020-07-21 02:20:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110731 to 110729. [2020-07-21 02:20:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110729 states. [2020-07-21 02:20:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110729 states to 110729 states and 175845 transitions. [2020-07-21 02:20:25,256 INFO L78 Accepts]: Start accepts. Automaton has 110729 states and 175845 transitions. Word has length 492 [2020-07-21 02:20:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:25,256 INFO L479 AbstractCegarLoop]: Abstraction has 110729 states and 175845 transitions. [2020-07-21 02:20:25,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 110729 states and 175845 transitions. [2020-07-21 02:20:25,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 02:20:25,347 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:25,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:25,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:25,548 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:25,549 INFO L82 PathProgramCache]: Analyzing trace with hash 579024689, now seen corresponding path program 1 times [2020-07-21 02:20:25,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:25,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796146028] [2020-07-21 02:20:25,550 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:25,900 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:25,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:25,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:25,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:26,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:26,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796146028] [2020-07-21 02:20:26,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:26,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:26,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809703832] [2020-07-21 02:20:26,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:26,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:26,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:26,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:26,308 INFO L87 Difference]: Start difference. First operand 110729 states and 175845 transitions. Second operand 3 states. [2020-07-21 02:20:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:40,166 INFO L93 Difference]: Finished difference Result 322372 states and 512792 transitions. [2020-07-21 02:20:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:40,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2020-07-21 02:20:40,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:40,412 INFO L225 Difference]: With dead ends: 322372 [2020-07-21 02:20:40,413 INFO L226 Difference]: Without dead ends: 216740 [2020-07-21 02:20:40,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216740 states. [2020-07-21 02:20:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216740 to 111642. [2020-07-21 02:20:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111642 states. [2020-07-21 02:20:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111642 states to 111642 states and 176915 transitions. [2020-07-21 02:20:48,222 INFO L78 Accepts]: Start accepts. Automaton has 111642 states and 176915 transitions. Word has length 493 [2020-07-21 02:20:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:48,222 INFO L479 AbstractCegarLoop]: Abstraction has 111642 states and 176915 transitions. [2020-07-21 02:20:48,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 111642 states and 176915 transitions. [2020-07-21 02:20:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 02:20:48,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:48,317 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:48,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:48,531 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:48,532 INFO L82 PathProgramCache]: Analyzing trace with hash -933405289, now seen corresponding path program 1 times [2020-07-21 02:20:48,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:48,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512790524] [2020-07-21 02:20:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:48,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:48,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:48,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:20:48,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:48,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:48,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512790524] [2020-07-21 02:20:48,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:48,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:20:48,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599397725] [2020-07-21 02:20:48,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:20:48,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:48,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:20:48,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:20:48,987 INFO L87 Difference]: Start difference. First operand 111642 states and 176915 transitions. Second operand 4 states. [2020-07-21 02:21:01,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:01,039 INFO L93 Difference]: Finished difference Result 262688 states and 419829 transitions. [2020-07-21 02:21:01,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:21:01,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-07-21 02:21:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:01,184 INFO L225 Difference]: With dead ends: 262688 [2020-07-21 02:21:01,184 INFO L226 Difference]: Without dead ends: 138248 [2020-07-21 02:21:01,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:21:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138248 states. [2020-07-21 02:21:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138248 to 138246. [2020-07-21 02:21:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138246 states. [2020-07-21 02:21:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138246 states to 138246 states and 219752 transitions. [2020-07-21 02:21:09,717 INFO L78 Accepts]: Start accepts. Automaton has 138246 states and 219752 transitions. Word has length 494 [2020-07-21 02:21:09,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:09,717 INFO L479 AbstractCegarLoop]: Abstraction has 138246 states and 219752 transitions. [2020-07-21 02:21:09,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:21:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 138246 states and 219752 transitions. [2020-07-21 02:21:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 02:21:09,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:09,834 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:10,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:10,035 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:10,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:10,036 INFO L82 PathProgramCache]: Analyzing trace with hash 81369320, now seen corresponding path program 1 times [2020-07-21 02:21:10,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:10,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321203609] [2020-07-21 02:21:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:10,695 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:10,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:10,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:21:10,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:21:10,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:10,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321203609] [2020-07-21 02:21:10,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:10,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:21:10,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183624778] [2020-07-21 02:21:10,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:21:10,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:10,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:21:10,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:21:10,821 INFO L87 Difference]: Start difference. First operand 138246 states and 219752 transitions. Second operand 4 states. [2020-07-21 02:21:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:23,376 INFO L93 Difference]: Finished difference Result 216098 states and 342146 transitions. [2020-07-21 02:21:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:21:23,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-21 02:21:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:23,566 INFO L225 Difference]: With dead ends: 216098 [2020-07-21 02:21:23,567 INFO L226 Difference]: Without dead ends: 180347 [2020-07-21 02:21:23,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:21:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180347 states. [2020-07-21 02:21:33,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180347 to 146081. [2020-07-21 02:21:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146081 states. [2020-07-21 02:21:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146081 states to 146081 states and 233172 transitions. [2020-07-21 02:21:33,792 INFO L78 Accepts]: Start accepts. Automaton has 146081 states and 233172 transitions. Word has length 496 [2020-07-21 02:21:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:33,792 INFO L479 AbstractCegarLoop]: Abstraction has 146081 states and 233172 transitions. [2020-07-21 02:21:33,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:21:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 146081 states and 233172 transitions. [2020-07-21 02:21:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 02:21:33,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:33,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:34,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:34,132 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:34,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1091697106, now seen corresponding path program 1 times [2020-07-21 02:21:34,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:34,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684810412] [2020-07-21 02:21:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:34,535 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:21:34,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:34,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 2033 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:21:34,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:21:34,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:34,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684810412] [2020-07-21 02:21:34,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:34,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:21:34,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912518760] [2020-07-21 02:21:34,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:21:34,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:34,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:21:34,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:34,802 INFO L87 Difference]: Start difference. First operand 146081 states and 233172 transitions. Second operand 3 states. [2020-07-21 02:21:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:53,780 INFO L93 Difference]: Finished difference Result 404895 states and 645152 transitions. [2020-07-21 02:21:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:21:53,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 02:21:53,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:54,088 INFO L225 Difference]: With dead ends: 404895 [2020-07-21 02:21:54,088 INFO L226 Difference]: Without dead ends: 279250 [2020-07-21 02:21:54,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:54,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279250 states. [2020-07-21 02:22:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279250 to 279248. [2020-07-21 02:22:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279248 states. [2020-07-21 02:22:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279248 states to 279248 states and 443667 transitions. [2020-07-21 02:22:17,261 INFO L78 Accepts]: Start accepts. Automaton has 279248 states and 443667 transitions. Word has length 496 [2020-07-21 02:22:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:22:17,262 INFO L479 AbstractCegarLoop]: Abstraction has 279248 states and 443667 transitions. [2020-07-21 02:22:17,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:22:17,262 INFO L276 IsEmpty]: Start isEmpty. Operand 279248 states and 443667 transitions. [2020-07-21 02:22:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 02:22:17,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:22:17,533 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:22:17,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:17,734 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:22:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:22:17,735 INFO L82 PathProgramCache]: Analyzing trace with hash -282525618, now seen corresponding path program 1 times [2020-07-21 02:22:17,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:22:17,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989493416] [2020-07-21 02:22:17,736 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:18,075 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:22:18,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:22:18,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:22:18,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:22:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:22:18,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:22:18,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989493416] [2020-07-21 02:22:18,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:22:18,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:22:18,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330000655] [2020-07-21 02:22:18,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:22:18,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:22:18,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:22:18,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:22:18,792 INFO L87 Difference]: Start difference. First operand 279248 states and 443667 transitions. Second operand 3 states. [2020-07-21 02:22:53,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:22:53,925 INFO L93 Difference]: Finished difference Result 714722 states and 1120726 transitions. [2020-07-21 02:22:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:22:53,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 02:22:53,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:22:54,546 INFO L225 Difference]: With dead ends: 714722 [2020-07-21 02:22:54,546 INFO L226 Difference]: Without dead ends: 496280 [2020-07-21 02:22:54,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:22:55,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496280 states. [2020-07-21 02:23:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496280 to 285056. [2020-07-21 02:23:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285056 states. [2020-07-21 02:23:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285056 states to 285056 states and 451947 transitions. [2020-07-21 02:23:21,770 INFO L78 Accepts]: Start accepts. Automaton has 285056 states and 451947 transitions. Word has length 499 [2020-07-21 02:23:21,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:21,770 INFO L479 AbstractCegarLoop]: Abstraction has 285056 states and 451947 transitions. [2020-07-21 02:23:21,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:21,770 INFO L276 IsEmpty]: Start isEmpty. Operand 285056 states and 451947 transitions. [2020-07-21 02:23:22,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 02:23:22,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:22,044 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:22,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:22,245 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:22,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1161470678, now seen corresponding path program 1 times [2020-07-21 02:23:22,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:22,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794982031] [2020-07-21 02:23:22,247 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:23,288 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:23,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:23,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:23:23,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:23,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:23,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794982031] [2020-07-21 02:23:23,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:23,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:23,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626626876] [2020-07-21 02:23:23,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:23,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:23,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:23,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:23,387 INFO L87 Difference]: Start difference. First operand 285056 states and 451947 transitions. Second operand 4 states. [2020-07-21 02:23:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:53,456 INFO L93 Difference]: Finished difference Result 519445 states and 823174 transitions. [2020-07-21 02:23:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:53,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-21 02:23:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:53,937 INFO L225 Difference]: With dead ends: 519445 [2020-07-21 02:23:53,937 INFO L226 Difference]: Without dead ends: 390985 [2020-07-21 02:23:54,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390985 states. [2020-07-21 02:24:21,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390985 to 292997. [2020-07-21 02:24:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292997 states. [2020-07-21 02:24:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292997 states to 292997 states and 464612 transitions. [2020-07-21 02:24:22,710 INFO L78 Accepts]: Start accepts. Automaton has 292997 states and 464612 transitions. Word has length 500 [2020-07-21 02:24:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:22,710 INFO L479 AbstractCegarLoop]: Abstraction has 292997 states and 464612 transitions. [2020-07-21 02:24:22,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 292997 states and 464612 transitions. [2020-07-21 02:24:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 02:24:22,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:22,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:23,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:23,205 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:23,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2030356772, now seen corresponding path program 1 times [2020-07-21 02:24:23,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:23,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247883890] [2020-07-21 02:24:23,207 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:23,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:23,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:23,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:24:23,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:23,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:23,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247883890] [2020-07-21 02:24:23,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:23,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:23,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768524430] [2020-07-21 02:24:23,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:23,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:23,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:23,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:23,691 INFO L87 Difference]: Start difference. First operand 292997 states and 464612 transitions. Second operand 4 states. [2020-07-21 02:24:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:45,240 INFO L93 Difference]: Finished difference Result 385375 states and 609626 transitions. [2020-07-21 02:24:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:45,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-07-21 02:24:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:45,583 INFO L225 Difference]: With dead ends: 385375 [2020-07-21 02:24:45,583 INFO L226 Difference]: Without dead ends: 293207 [2020-07-21 02:24:45,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293207 states. [2020-07-21 02:25:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293207 to 245070. [2020-07-21 02:25:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245070 states. [2020-07-21 02:25:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245070 states to 245070 states and 385509 transitions. [2020-07-21 02:25:11,697 INFO L78 Accepts]: Start accepts. Automaton has 245070 states and 385509 transitions. Word has length 501 [2020-07-21 02:25:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:11,697 INFO L479 AbstractCegarLoop]: Abstraction has 245070 states and 385509 transitions. [2020-07-21 02:25:11,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:25:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand 245070 states and 385509 transitions. [2020-07-21 02:25:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 02:25:11,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:11,942 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:25:12,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:12,143 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:12,144 INFO L82 PathProgramCache]: Analyzing trace with hash 477038301, now seen corresponding path program 1 times [2020-07-21 02:25:12,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:12,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510309005] [2020-07-21 02:25:12,145 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:12,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:25:12,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:12,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:25:12,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:12,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:12,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510309005] [2020-07-21 02:25:12,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:12,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:25:12,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280917421] [2020-07-21 02:25:12,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:25:12,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:12,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:25:12,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:25:12,739 INFO L87 Difference]: Start difference. First operand 245070 states and 385509 transitions. Second operand 4 states. [2020-07-21 02:25:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:59,075 INFO L93 Difference]: Finished difference Result 720588 states and 1133841 transitions. [2020-07-21 02:25:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:25:59,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-21 02:25:59,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:59,729 INFO L225 Difference]: With dead ends: 720588 [2020-07-21 02:25:59,729 INFO L226 Difference]: Without dead ends: 476672 [2020-07-21 02:25:59,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:26:00,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476672 states. [2020-07-21 02:26:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476672 to 475784. [2020-07-21 02:26:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475784 states. [2020-07-21 02:26:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475784 states to 475784 states and 745280 transitions. [2020-07-21 02:26:48,138 INFO L78 Accepts]: Start accepts. Automaton has 475784 states and 745280 transitions. Word has length 504 [2020-07-21 02:26:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:26:48,139 INFO L479 AbstractCegarLoop]: Abstraction has 475784 states and 745280 transitions. [2020-07-21 02:26:48,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:26:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 475784 states and 745280 transitions. [2020-07-21 02:26:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 02:26:48,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:26:48,695 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:26:48,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:48,895 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:26:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:26:48,896 INFO L82 PathProgramCache]: Analyzing trace with hash 281457076, now seen corresponding path program 1 times [2020-07-21 02:26:48,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:26:48,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004441963] [2020-07-21 02:26:48,897 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:49,246 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:26:49,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:26:49,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:26:49,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:26:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:26:49,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:26:49,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004441963] [2020-07-21 02:26:49,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:26:49,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:26:49,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108929721] [2020-07-21 02:26:49,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:26:49,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:26:49,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:26:49,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:26:49,375 INFO L87 Difference]: Start difference. First operand 475784 states and 745280 transitions. Second operand 4 states. [2020-07-21 02:28:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:01,129 INFO L93 Difference]: Finished difference Result 1073645 states and 1678119 transitions. [2020-07-21 02:28:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:28:01,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-21 02:28:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:02,168 INFO L225 Difference]: With dead ends: 1073645 [2020-07-21 02:28:02,168 INFO L226 Difference]: Without dead ends: 763722 [2020-07-21 02:28:03,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:28:03,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763722 states. [2020-07-21 02:29:00,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763722 to 511130. [2020-07-21 02:29:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511130 states. [2020-07-21 02:29:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511130 states to 511130 states and 801160 transitions. [2020-07-21 02:29:01,795 INFO L78 Accepts]: Start accepts. Automaton has 511130 states and 801160 transitions. Word has length 505 [2020-07-21 02:29:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:29:01,795 INFO L479 AbstractCegarLoop]: Abstraction has 511130 states and 801160 transitions. [2020-07-21 02:29:01,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:29:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 511130 states and 801160 transitions. [2020-07-21 02:29:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 02:29:02,412 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:02,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:29:02,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:02,613 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:02,614 INFO L82 PathProgramCache]: Analyzing trace with hash -939467826, now seen corresponding path program 1 times [2020-07-21 02:29:02,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:02,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699832487] [2020-07-21 02:29:02,615 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:03,005 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:29:03,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:03,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2056 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:29:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:29:03,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:03,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699832487] [2020-07-21 02:29:03,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:03,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:29:03,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574999712] [2020-07-21 02:29:03,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:29:03,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:03,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:29:03,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:03,946 INFO L87 Difference]: Start difference. First operand 511130 states and 801160 transitions. Second operand 3 states.