/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 21:05:22,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:05:22,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:05:22,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:05:22,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:05:22,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:05:22,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:05:22,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:05:22,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:05:22,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:05:22,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:05:22,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:05:22,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:05:22,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:05:22,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:05:22,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:05:22,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:05:22,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:05:22,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:05:22,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:05:22,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:05:22,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:05:22,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:05:22,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:05:22,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 21:05:22,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:05:22,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:05:22,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:05:22,749 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 21:05:22,763 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:05:22,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:05:22,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:05:22,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:05:22,765 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:05:22,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:05:22,766 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 21:05:22,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:05:22,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 21:05:22,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:05:22,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:05:22,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:05:22,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:05:22,767 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 21:05:22,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:05:22,768 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:05:22,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:05:22,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:05:22,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:05:22,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:05:22,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:05:22,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:05:22,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:05:22,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:05:22,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:05:22,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:05:22,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:22,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:05:22,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:05:22,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 21:05:23,099 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:05:23,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:05:23,126 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:05:23,127 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:05:23,128 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:05:23,128 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:05:23,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cccdb2937/25377f9257c7401d9f70bf6bca814ca6/FLAG125c4de8d [2020-07-21 21:05:23,805 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:05:23,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:05:23,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cccdb2937/25377f9257c7401d9f70bf6bca814ca6/FLAG125c4de8d [2020-07-21 21:05:24,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cccdb2937/25377f9257c7401d9f70bf6bca814ca6 [2020-07-21 21:05:24,068 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:05:24,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:05:24,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:05:24,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:05:24,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:05:24,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:05:24" (1/1) ... [2020-07-21 21:05:24,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5355e6c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:24, skipping insertion in model container [2020-07-21 21:05:24,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:05:24" (1/1) ... [2020-07-21 21:05:24,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:05:24,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:05:25,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:05:25,292 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:05:26,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:05:26,090 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:05:26,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:26 WrapperNode [2020-07-21 21:05:26,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:05:26,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:05:26,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:05:26,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:05:26,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:26" (1/1) ... [2020-07-21 21:05:26,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:26" (1/1) ... [2020-07-21 21:05:26,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:26" (1/1) ... [2020-07-21 21:05:26,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:26" (1/1) ... [2020-07-21 21:05:26,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:26" (1/1) ... [2020-07-21 21:05:26,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:26" (1/1) ... [2020-07-21 21:05:26,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:26" (1/1) ... [2020-07-21 21:05:26,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:05:26,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:05:26,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:05:26,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:05:26,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:26" (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 21:05:26,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:05:26,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:05:26,463 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:05:26,463 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:05:26,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:05:26,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 21:05:26,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 21:05:26,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 21:05:26,465 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 21:05:26,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:05:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:05:26,467 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 21:05:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 21:05:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 21:05:26,468 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 21:05:26,469 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 21:05:26,470 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 21:05:26,470 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 21:05:26,470 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 21:05:26,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:05:26,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:05:26,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:05:29,241 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:05:29,241 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 21:05:29,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:05:29 BoogieIcfgContainer [2020-07-21 21:05:29,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:05:29,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:05:29,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:05:29,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:05:29,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:05:24" (1/3) ... [2020-07-21 21:05:29,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df50cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:05:29, skipping insertion in model container [2020-07-21 21:05:29,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:26" (2/3) ... [2020-07-21 21:05:29,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df50cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:05:29, skipping insertion in model container [2020-07-21 21:05:29,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:05:29" (3/3) ... [2020-07-21 21:05:29,259 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:05:29,272 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:05:29,283 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 21:05:29,297 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 21:05:29,330 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:05:29,331 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:05:29,331 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:05:29,331 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:05:29,331 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:05:29,331 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:05:29,331 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:05:29,331 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:05:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-21 21:05:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:05:29,416 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:29,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:29,418 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:29,426 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-21 21:05:29,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:29,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908178537] [2020-07-21 21:05:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:30,028 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:30,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:30,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:30,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:30,290 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 21:05:30,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:30,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908178537] [2020-07-21 21:05:30,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:30,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:30,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268464682] [2020-07-21 21:05:30,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:30,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:30,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:30,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:30,318 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 3 states. [2020-07-21 21:05:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:30,677 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-07-21 21:05:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:30,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 21:05:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:30,736 INFO L225 Difference]: With dead ends: 1489 [2020-07-21 21:05:30,736 INFO L226 Difference]: Without dead ends: 1273 [2020-07-21 21:05:30,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 21:05:30,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-07-21 21:05:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-07-21 21:05:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-07-21 21:05:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-07-21 21:05:30,927 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-07-21 21:05:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:30,933 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-07-21 21:05:30,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-07-21 21:05:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:05:30,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:30,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:31,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:31,158 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:31,159 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-07-21 21:05:31,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:31,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405367669] [2020-07-21 21:05:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:31,644 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:31,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:31,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 2047 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:31,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:31,823 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 21:05:31,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:31,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405367669] [2020-07-21 21:05:31,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:31,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:31,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063780864] [2020-07-21 21:05:31,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:31,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:31,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:31,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:31,828 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 3 states. [2020-07-21 21:05:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:32,030 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-07-21 21:05:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:32,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 21:05:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:32,045 INFO L225 Difference]: With dead ends: 2607 [2020-07-21 21:05:32,045 INFO L226 Difference]: Without dead ends: 2225 [2020-07-21 21:05:32,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 21:05:32,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-07-21 21:05:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-07-21 21:05:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-07-21 21:05:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-07-21 21:05:32,134 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-07-21 21:05:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:32,135 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-07-21 21:05:32,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-07-21 21:05:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:05:32,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:32,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:32,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:32,347 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:32,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-07-21 21:05:32,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:32,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372952505] [2020-07-21 21:05:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:32,717 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:32,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:32,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:32,882 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 21:05:32,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:32,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372952505] [2020-07-21 21:05:32,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:32,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:32,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15674557] [2020-07-21 21:05:32,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:32,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:32,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:32,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:32,885 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 3 states. [2020-07-21 21:05:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:33,181 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-07-21 21:05:33,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:33,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 21:05:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:33,211 INFO L225 Difference]: With dead ends: 4715 [2020-07-21 21:05:33,211 INFO L226 Difference]: Without dead ends: 4049 [2020-07-21 21:05:33,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 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 21:05:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-07-21 21:05:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-07-21 21:05:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-07-21 21:05:33,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-07-21 21:05:33,407 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-07-21 21:05:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:33,408 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-07-21 21:05:33,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-07-21 21:05:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:05:33,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:33,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:33,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:33,642 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:33,643 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-07-21 21:05:33,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:33,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800256732] [2020-07-21 21:05:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:34,195 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:34,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:34,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:05:34,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:34,389 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 21:05:34,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:34,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800256732] [2020-07-21 21:05:34,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:34,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:34,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980529212] [2020-07-21 21:05:34,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:34,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:34,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:34,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:34,393 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 4 states. [2020-07-21 21:05:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:34,866 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-07-21 21:05:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:05:34,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 21:05:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:34,905 INFO L225 Difference]: With dead ends: 11998 [2020-07-21 21:05:34,905 INFO L226 Difference]: Without dead ends: 7966 [2020-07-21 21:05:34,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:05:34,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-07-21 21:05:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-07-21 21:05:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-07-21 21:05:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-07-21 21:05:35,373 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-07-21 21:05:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:35,373 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-07-21 21:05:35,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-07-21 21:05:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 21:05:35,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:35,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:35,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:35,619 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:35,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-07-21 21:05:35,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:35,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870009490] [2020-07-21 21:05:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:36,420 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:36,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:36,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:36,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:36,808 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 21:05:36,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:36,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870009490] [2020-07-21 21:05:36,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:36,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:36,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016448510] [2020-07-21 21:05:36,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:36,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:36,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:36,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:36,813 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 3 states. [2020-07-21 21:05:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:37,439 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-07-21 21:05:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:37,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 21:05:37,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:37,506 INFO L225 Difference]: With dead ends: 23441 [2020-07-21 21:05:37,506 INFO L226 Difference]: Without dead ends: 15606 [2020-07-21 21:05:37,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-07-21 21:05:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-07-21 21:05:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-07-21 21:05:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-07-21 21:05:38,299 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-07-21 21:05:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:38,300 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-07-21 21:05:38,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-07-21 21:05:38,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 21:05:38,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:38,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:38,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:38,563 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:38,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:38,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-07-21 21:05:38,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:38,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467006686] [2020-07-21 21:05:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:38,850 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:38,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:38,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:38,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:38,935 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 21:05:38,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:38,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467006686] [2020-07-21 21:05:38,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:38,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:38,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937564185] [2020-07-21 21:05:38,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:38,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:38,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:38,950 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 3 states. [2020-07-21 21:05:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:39,961 INFO L93 Difference]: Finished difference Result 46735 states and 71549 transitions. [2020-07-21 21:05:39,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:39,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 21:05:39,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:40,048 INFO L225 Difference]: With dead ends: 46735 [2020-07-21 21:05:40,048 INFO L226 Difference]: Without dead ends: 31170 [2020-07-21 21:05:40,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31170 states. [2020-07-21 21:05:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31170 to 15618. [2020-07-21 21:05:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15618 states. [2020-07-21 21:05:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15618 states to 15618 states and 23910 transitions. [2020-07-21 21:05:41,885 INFO L78 Accepts]: Start accepts. Automaton has 15618 states and 23910 transitions. Word has length 328 [2020-07-21 21:05:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:41,886 INFO L479 AbstractCegarLoop]: Abstraction has 15618 states and 23910 transitions. [2020-07-21 21:05:41,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 15618 states and 23910 transitions. [2020-07-21 21:05:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-21 21:05:41,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:41,915 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] [2020-07-21 21:05:42,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:42,130 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash -45408789, now seen corresponding path program 1 times [2020-07-21 21:05:42,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:42,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472085885] [2020-07-21 21:05:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:42,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:42,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:42,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:42,602 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 21:05:42,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:42,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472085885] [2020-07-21 21:05:42,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:42,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:42,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666898461] [2020-07-21 21:05:42,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:42,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:42,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:42,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:42,605 INFO L87 Difference]: Start difference. First operand 15618 states and 23910 transitions. Second operand 3 states. [2020-07-21 21:05:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:43,654 INFO L93 Difference]: Finished difference Result 46757 states and 71579 transitions. [2020-07-21 21:05:43,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:43,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-21 21:05:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:43,719 INFO L225 Difference]: With dead ends: 46757 [2020-07-21 21:05:43,720 INFO L226 Difference]: Without dead ends: 31193 [2020-07-21 21:05:43,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 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 21:05:43,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31193 states. [2020-07-21 21:05:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31193 to 15641. [2020-07-21 21:05:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15641 states. [2020-07-21 21:05:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15641 states to 15641 states and 23942 transitions. [2020-07-21 21:05:44,433 INFO L78 Accepts]: Start accepts. Automaton has 15641 states and 23942 transitions. Word has length 329 [2020-07-21 21:05:44,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:44,433 INFO L479 AbstractCegarLoop]: Abstraction has 15641 states and 23942 transitions. [2020-07-21 21:05:44,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 15641 states and 23942 transitions. [2020-07-21 21:05:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:44,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:44,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:44,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:44,679 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:44,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:44,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1733447043, now seen corresponding path program 1 times [2020-07-21 21:05:44,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:44,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86629814] [2020-07-21 21:05:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:05:44,933 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:44,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:44,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:05:44,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:45,097 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 21:05:45,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:45,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86629814] [2020-07-21 21:05:45,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:45,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:45,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422296240] [2020-07-21 21:05:45,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:45,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:45,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:45,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:45,100 INFO L87 Difference]: Start difference. First operand 15641 states and 23942 transitions. Second operand 4 states. [2020-07-21 21:05:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:45,688 INFO L93 Difference]: Finished difference Result 31943 states and 48884 transitions. [2020-07-21 21:05:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:05:45,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 21:05:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:45,730 INFO L225 Difference]: With dead ends: 31943 [2020-07-21 21:05:45,730 INFO L226 Difference]: Without dead ends: 16094 [2020-07-21 21:05:45,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:05:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16094 states. [2020-07-21 21:05:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16094 to 16092. [2020-07-21 21:05:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16092 states. [2020-07-21 21:05:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16092 states to 16092 states and 24528 transitions. [2020-07-21 21:05:46,520 INFO L78 Accepts]: Start accepts. Automaton has 16092 states and 24528 transitions. Word has length 330 [2020-07-21 21:05:46,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:46,520 INFO L479 AbstractCegarLoop]: Abstraction has 16092 states and 24528 transitions. [2020-07-21 21:05:46,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 16092 states and 24528 transitions. [2020-07-21 21:05:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 21:05:46,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:46,561 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] [2020-07-21 21:05:46,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:46,775 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:46,776 INFO L82 PathProgramCache]: Analyzing trace with hash 82673009, now seen corresponding path program 1 times [2020-07-21 21:05:46,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:46,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789141400] [2020-07-21 21:05:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:05:47,112 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:47,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:47,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 2066 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 21:05:47,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:47,323 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 21:05:47,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:47,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789141400] [2020-07-21 21:05:47,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:47,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 21:05:47,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889028931] [2020-07-21 21:05:47,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 21:05:47,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:47,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 21:05:47,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 21:05:47,326 INFO L87 Difference]: Start difference. First operand 16092 states and 24528 transitions. Second operand 8 states. [2020-07-21 21:05:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:49,807 INFO L93 Difference]: Finished difference Result 44700 states and 69004 transitions. [2020-07-21 21:05:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 21:05:49,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 331 [2020-07-21 21:05:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:49,876 INFO L225 Difference]: With dead ends: 44700 [2020-07-21 21:05:49,877 INFO L226 Difference]: Without dead ends: 29894 [2020-07-21 21:05:49,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 21:05:49,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29894 states. [2020-07-21 21:05:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29894 to 20938. [2020-07-21 21:05:51,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20938 states. [2020-07-21 21:05:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20938 states to 20938 states and 31731 transitions. [2020-07-21 21:05:51,546 INFO L78 Accepts]: Start accepts. Automaton has 20938 states and 31731 transitions. Word has length 331 [2020-07-21 21:05:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:51,546 INFO L479 AbstractCegarLoop]: Abstraction has 20938 states and 31731 transitions. [2020-07-21 21:05:51,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 21:05:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 20938 states and 31731 transitions. [2020-07-21 21:05:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 21:05:51,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:51,569 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] [2020-07-21 21:05:51,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:51,783 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:51,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1997769565, now seen corresponding path program 1 times [2020-07-21 21:05:51,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:51,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363330603] [2020-07-21 21:05:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:05:52,112 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:52,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:52,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:52,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:52,188 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 21:05:52,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:52,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363330603] [2020-07-21 21:05:52,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:52,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:52,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532669130] [2020-07-21 21:05:52,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:52,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:52,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:52,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:52,191 INFO L87 Difference]: Start difference. First operand 20938 states and 31731 transitions. Second operand 3 states. [2020-07-21 21:05:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:53,126 INFO L93 Difference]: Finished difference Result 47244 states and 71955 transitions. [2020-07-21 21:05:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:53,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 21:05:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:53,186 INFO L225 Difference]: With dead ends: 47244 [2020-07-21 21:05:53,187 INFO L226 Difference]: Without dead ends: 27514 [2020-07-21 21:05:53,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 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 21:05:53,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27514 states. [2020-07-21 21:05:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27514 to 24584. [2020-07-21 21:05:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-07-21 21:05:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 37563 transitions. [2020-07-21 21:05:54,478 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 37563 transitions. Word has length 331 [2020-07-21 21:05:54,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:54,479 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 37563 transitions. [2020-07-21 21:05:54,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 37563 transitions. [2020-07-21 21:05:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 21:05:54,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:54,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:54,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:54,702 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2032181022, now seen corresponding path program 1 times [2020-07-21 21:05:54,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:54,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580487273] [2020-07-21 21:05:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:05:54,924 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:54,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:54,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:54,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:55,001 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 21:05:55,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:55,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580487273] [2020-07-21 21:05:55,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:55,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:55,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23930790] [2020-07-21 21:05:55,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:55,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:55,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:55,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:55,004 INFO L87 Difference]: Start difference. First operand 24584 states and 37563 transitions. Second operand 3 states. [2020-07-21 21:05:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:56,558 INFO L93 Difference]: Finished difference Result 73172 states and 111710 transitions. [2020-07-21 21:05:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:56,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 21:05:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:56,623 INFO L225 Difference]: With dead ends: 73172 [2020-07-21 21:05:56,623 INFO L226 Difference]: Without dead ends: 48887 [2020-07-21 21:05:56,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48887 states. [2020-07-21 21:05:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48887 to 24614. [2020-07-21 21:05:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24614 states. [2020-07-21 21:05:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24614 states to 24614 states and 37598 transitions. [2020-07-21 21:05:58,948 INFO L78 Accepts]: Start accepts. Automaton has 24614 states and 37598 transitions. Word has length 332 [2020-07-21 21:05:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:58,949 INFO L479 AbstractCegarLoop]: Abstraction has 24614 states and 37598 transitions. [2020-07-21 21:05:58,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 24614 states and 37598 transitions. [2020-07-21 21:05:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 21:05:58,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:58,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:59,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:59,169 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:59,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:59,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1052921786, now seen corresponding path program 1 times [2020-07-21 21:05:59,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:59,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277594935] [2020-07-21 21:05:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:05:59,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:59,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:59,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 2059 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:59,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:59,640 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 21:05:59,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:59,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277594935] [2020-07-21 21:05:59,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:59,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:59,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42117420] [2020-07-21 21:05:59,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:59,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:59,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:59,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:59,642 INFO L87 Difference]: Start difference. First operand 24614 states and 37598 transitions. Second operand 3 states. [2020-07-21 21:06:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:01,279 INFO L93 Difference]: Finished difference Result 70152 states and 106951 transitions. [2020-07-21 21:06:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:01,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 21:06:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:01,330 INFO L225 Difference]: With dead ends: 70152 [2020-07-21 21:06:01,330 INFO L226 Difference]: Without dead ends: 45965 [2020-07-21 21:06:01,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45965 states. [2020-07-21 21:06:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45965 to 45963. [2020-07-21 21:06:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45963 states. [2020-07-21 21:06:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45963 states to 45963 states and 69726 transitions. [2020-07-21 21:06:03,315 INFO L78 Accepts]: Start accepts. Automaton has 45963 states and 69726 transitions. Word has length 332 [2020-07-21 21:06:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:03,315 INFO L479 AbstractCegarLoop]: Abstraction has 45963 states and 69726 transitions. [2020-07-21 21:06:03,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 45963 states and 69726 transitions. [2020-07-21 21:06:03,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 21:06:03,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:03,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:06:03,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:03,555 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1231527171, now seen corresponding path program 1 times [2020-07-21 21:06:03,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:03,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176548665] [2020-07-21 21:06:03,558 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:06:03,806 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:03,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:03,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:06:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:03,902 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 21:06:03,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:03,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176548665] [2020-07-21 21:06:03,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:03,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:06:03,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766578359] [2020-07-21 21:06:03,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:06:03,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:06:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:06:03,904 INFO L87 Difference]: Start difference. First operand 45963 states and 69726 transitions. Second operand 4 states. [2020-07-21 21:06:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:09,080 INFO L93 Difference]: Finished difference Result 133924 states and 202944 transitions. [2020-07-21 21:06:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:06:09,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 21:06:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:09,178 INFO L225 Difference]: With dead ends: 133924 [2020-07-21 21:06:09,178 INFO L226 Difference]: Without dead ends: 88782 [2020-07-21 21:06:09,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 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 21:06:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88782 states. [2020-07-21 21:06:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88782 to 46235. [2020-07-21 21:06:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46235 states. [2020-07-21 21:06:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46235 states to 46235 states and 70156 transitions. [2020-07-21 21:06:11,514 INFO L78 Accepts]: Start accepts. Automaton has 46235 states and 70156 transitions. Word has length 332 [2020-07-21 21:06:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:11,514 INFO L479 AbstractCegarLoop]: Abstraction has 46235 states and 70156 transitions. [2020-07-21 21:06:11,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:06:11,514 INFO L276 IsEmpty]: Start isEmpty. Operand 46235 states and 70156 transitions. [2020-07-21 21:06:11,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 21:06:11,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:11,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:06:11,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:11,760 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:11,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1874773864, now seen corresponding path program 1 times [2020-07-21 21:06:11,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:11,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059048019] [2020-07-21 21:06:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:06:11,984 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:11,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:06:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:12,100 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 21:06:12,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:12,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059048019] [2020-07-21 21:06:12,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:12,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:06:12,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059358132] [2020-07-21 21:06:12,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:06:12,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:12,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:06:12,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:06:12,102 INFO L87 Difference]: Start difference. First operand 46235 states and 70156 transitions. Second operand 9 states. [2020-07-21 21:06:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:25,647 INFO L93 Difference]: Finished difference Result 208031 states and 324371 transitions. [2020-07-21 21:06:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 21:06:25,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 334 [2020-07-21 21:06:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:25,937 INFO L225 Difference]: With dead ends: 208031 [2020-07-21 21:06:25,938 INFO L226 Difference]: Without dead ends: 193197 [2020-07-21 21:06:26,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 21:06:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193197 states. [2020-07-21 21:06:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193197 to 93657. [2020-07-21 21:06:31,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93657 states. [2020-07-21 21:06:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93657 states to 93657 states and 143406 transitions. [2020-07-21 21:06:31,717 INFO L78 Accepts]: Start accepts. Automaton has 93657 states and 143406 transitions. Word has length 334 [2020-07-21 21:06:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:31,718 INFO L479 AbstractCegarLoop]: Abstraction has 93657 states and 143406 transitions. [2020-07-21 21:06:31,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 21:06:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 93657 states and 143406 transitions. [2020-07-21 21:06:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 21:06:31,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:31,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:06:31,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:31,957 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:31,958 INFO L82 PathProgramCache]: Analyzing trace with hash -846358176, now seen corresponding path program 1 times [2020-07-21 21:06:31,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:31,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238805486] [2020-07-21 21:06:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:06:32,300 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:06:32,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:32,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:32,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:32,391 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 21:06:32,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:32,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238805486] [2020-07-21 21:06:32,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:32,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:32,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585464758] [2020-07-21 21:06:32,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:32,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:32,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:32,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:32,394 INFO L87 Difference]: Start difference. First operand 93657 states and 143406 transitions. Second operand 3 states. [2020-07-21 21:06:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:40,757 INFO L93 Difference]: Finished difference Result 227179 states and 350760 transitions. [2020-07-21 21:06:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:40,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 21:06:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:40,937 INFO L225 Difference]: With dead ends: 227179 [2020-07-21 21:06:40,937 INFO L226 Difference]: Without dead ends: 136541 [2020-07-21 21:06:41,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 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 21:06:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136541 states. [2020-07-21 21:06:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136541 to 122251. [2020-07-21 21:06:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122251 states. [2020-07-21 21:06:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122251 states to 122251 states and 189862 transitions. [2020-07-21 21:06:50,567 INFO L78 Accepts]: Start accepts. Automaton has 122251 states and 189862 transitions. Word has length 334 [2020-07-21 21:06:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:50,567 INFO L479 AbstractCegarLoop]: Abstraction has 122251 states and 189862 transitions. [2020-07-21 21:06:50,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 122251 states and 189862 transitions. [2020-07-21 21:06:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 21:06:50,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:50,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:06:50,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:50,802 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1629676237, now seen corresponding path program 1 times [2020-07-21 21:06:50,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:50,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584138642] [2020-07-21 21:06:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:06:51,039 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:51,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:51,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:51,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:51,099 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 21:06:51,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:51,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584138642] [2020-07-21 21:06:51,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:51,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:51,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006728566] [2020-07-21 21:06:51,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:51,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:51,101 INFO L87 Difference]: Start difference. First operand 122251 states and 189862 transitions. Second operand 3 states. [2020-07-21 21:07:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:07:04,145 INFO L93 Difference]: Finished difference Result 364535 states and 565886 transitions. [2020-07-21 21:07:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:07:04,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 21:07:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:07:04,477 INFO L225 Difference]: With dead ends: 364535 [2020-07-21 21:07:04,477 INFO L226 Difference]: Without dead ends: 243403 [2020-07-21 21:07:04,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 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 21:07:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243403 states. [2020-07-21 21:07:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243403 to 122377. [2020-07-21 21:07:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122377 states. [2020-07-21 21:07:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122377 states to 122377 states and 190026 transitions. [2020-07-21 21:07:16,473 INFO L78 Accepts]: Start accepts. Automaton has 122377 states and 190026 transitions. Word has length 334 [2020-07-21 21:07:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:16,473 INFO L479 AbstractCegarLoop]: Abstraction has 122377 states and 190026 transitions. [2020-07-21 21:07:16,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:07:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 122377 states and 190026 transitions. [2020-07-21 21:07:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 21:07:16,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:16,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:07:16,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:16,709 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash 924020310, now seen corresponding path program 1 times [2020-07-21 21:07:16,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:16,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714574702] [2020-07-21 21:07:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:07:17,047 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:07:17,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:17,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 2071 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:07:17,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:17,269 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 21:07:17,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:17,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714574702] [2020-07-21 21:07:17,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:17,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:07:17,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456600783] [2020-07-21 21:07:17,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:07:17,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:17,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:07:17,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:07:17,272 INFO L87 Difference]: Start difference. First operand 122377 states and 190026 transitions. Second operand 5 states. [2020-07-21 21:07:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:07:32,649 INFO L93 Difference]: Finished difference Result 325158 states and 510141 transitions. [2020-07-21 21:07:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:07:32,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-21 21:07:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:07:33,015 INFO L225 Difference]: With dead ends: 325158 [2020-07-21 21:07:33,016 INFO L226 Difference]: Without dead ends: 237308 [2020-07-21 21:07:33,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:07:33,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237308 states. [2020-07-21 21:07:51,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237308 to 237306. [2020-07-21 21:07:51,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237306 states. [2020-07-21 21:07:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237306 states to 237306 states and 368610 transitions. [2020-07-21 21:07:52,432 INFO L78 Accepts]: Start accepts. Automaton has 237306 states and 368610 transitions. Word has length 334 [2020-07-21 21:07:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:52,433 INFO L479 AbstractCegarLoop]: Abstraction has 237306 states and 368610 transitions. [2020-07-21 21:07:52,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:07:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 237306 states and 368610 transitions. [2020-07-21 21:07:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 21:07:52,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:52,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:07:52,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:52,706 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:52,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:52,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2073937905, now seen corresponding path program 1 times [2020-07-21 21:07:52,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:52,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542904366] [2020-07-21 21:07:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:07:53,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:07:53,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:53,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:07:53,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:53,159 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 21:07:53,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:53,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542904366] [2020-07-21 21:07:53,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:53,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:07:53,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079637729] [2020-07-21 21:07:53,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:07:53,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:53,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:07:53,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:07:53,161 INFO L87 Difference]: Start difference. First operand 237306 states and 368610 transitions. Second operand 4 states. [2020-07-21 21:08:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:25,646 INFO L93 Difference]: Finished difference Result 702264 states and 1090836 transitions. [2020-07-21 21:08:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:08:25,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 21:08:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:26,459 INFO L225 Difference]: With dead ends: 702264 [2020-07-21 21:08:26,459 INFO L226 Difference]: Without dead ends: 465296 [2020-07-21 21:08:26,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:08:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465296 states. [2020-07-21 21:09:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465296 to 465294. [2020-07-21 21:09:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465294 states. [2020-07-21 21:09:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465294 states to 465294 states and 720118 transitions. [2020-07-21 21:09:09,327 INFO L78 Accepts]: Start accepts. Automaton has 465294 states and 720118 transitions. Word has length 334 [2020-07-21 21:09:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:09,327 INFO L479 AbstractCegarLoop]: Abstraction has 465294 states and 720118 transitions. [2020-07-21 21:09:09,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:09:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 465294 states and 720118 transitions. [2020-07-21 21:09:09,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 21:09:09,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:09,463 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] [2020-07-21 21:09:09,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:09,664 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:09,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash 59334576, now seen corresponding path program 1 times [2020-07-21 21:09:09,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:09,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728075889] [2020-07-21 21:09:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:09:09,912 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:09:09,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:09,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:09:09,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:10,917 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 21:09:10,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:10,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728075889] [2020-07-21 21:09:10,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:10,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:09:10,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082562307] [2020-07-21 21:09:10,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:09:10,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:10,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:09:10,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:10,919 INFO L87 Difference]: Start difference. First operand 465294 states and 720118 transitions. Second operand 3 states. [2020-07-21 21:10:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:10:29,399 INFO L93 Difference]: Finished difference Result 1391645 states and 2153516 transitions. [2020-07-21 21:10:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:10:29,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 21:10:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:10:31,128 INFO L225 Difference]: With dead ends: 1391645 [2020-07-21 21:10:31,128 INFO L226 Difference]: Without dead ends: 928294 [2020-07-21 21:10:31,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:10:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928294 states. [2020-07-21 21:11:32,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928294 to 465572. [2020-07-21 21:11:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465572 states. [2020-07-21 21:11:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465572 states to 465572 states and 720448 transitions. [2020-07-21 21:11:33,441 INFO L78 Accepts]: Start accepts. Automaton has 465572 states and 720448 transitions. Word has length 335 [2020-07-21 21:11:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:11:33,441 INFO L479 AbstractCegarLoop]: Abstraction has 465572 states and 720448 transitions. [2020-07-21 21:11:33,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:11:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 465572 states and 720448 transitions. [2020-07-21 21:11:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 21:11:33,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:11:33,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:11:33,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:11:33,777 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:11:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:11:33,777 INFO L82 PathProgramCache]: Analyzing trace with hash -608802720, now seen corresponding path program 1 times [2020-07-21 21:11:33,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:11:33,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806895551] [2020-07-21 21:11:33,778 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:11:34,019 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:11:34,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:11:34,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:11:34,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:11:34,107 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 21:11:34,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:11:34,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806895551] [2020-07-21 21:11:34,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:11:34,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:11:34,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038776740] [2020-07-21 21:11:34,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:11:34,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:11:34,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:11:34,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:11:34,110 INFO L87 Difference]: Start difference. First operand 465572 states and 720448 transitions. Second operand 4 states. [2020-07-21 21:12:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:12:15,920 INFO L93 Difference]: Finished difference Result 916532 states and 1418398 transitions. [2020-07-21 21:12:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:12:15,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-21 21:12:15,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:12:16,688 INFO L225 Difference]: With dead ends: 916532 [2020-07-21 21:12:16,688 INFO L226 Difference]: Without dead ends: 452884 [2020-07-21 21:12:17,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:12:18,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452884 states. [2020-07-21 21:13:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452884 to 452738. [2020-07-21 21:13:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452738 states. [2020-07-21 21:13:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452738 states to 452738 states and 700800 transitions. [2020-07-21 21:13:02,699 INFO L78 Accepts]: Start accepts. Automaton has 452738 states and 700800 transitions. Word has length 336 [2020-07-21 21:13:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:02,699 INFO L479 AbstractCegarLoop]: Abstraction has 452738 states and 700800 transitions. [2020-07-21 21:13:02,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:13:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 452738 states and 700800 transitions. [2020-07-21 21:13:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 21:13:02,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:02,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:03,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:03,019 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:03,020 INFO L82 PathProgramCache]: Analyzing trace with hash -321463587, now seen corresponding path program 1 times [2020-07-21 21:13:03,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:03,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367863360] [2020-07-21 21:13:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:03,369 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:13:03,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:03,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:03,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:04,507 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 21:13:04,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:04,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367863360] [2020-07-21 21:13:04,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:04,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:04,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359783478] [2020-07-21 21:13:04,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:04,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:04,510 INFO L87 Difference]: Start difference. First operand 452738 states and 700800 transitions. Second operand 3 states. [2020-07-21 21:14:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:17,701 INFO L93 Difference]: Finished difference Result 1341308 states and 2076997 transitions. [2020-07-21 21:14:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:14:17,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 21:14:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:19,233 INFO L225 Difference]: With dead ends: 1341308 [2020-07-21 21:14:19,233 INFO L226 Difference]: Without dead ends: 890121 [2020-07-21 21:14:19,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890121 states. [2020-07-21 21:15:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890121 to 890119. [2020-07-21 21:15:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890119 states. [2020-07-21 21:15:57,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890119 states to 890119 states and 1374114 transitions. [2020-07-21 21:15:57,659 INFO L78 Accepts]: Start accepts. Automaton has 890119 states and 1374114 transitions. Word has length 336 [2020-07-21 21:15:57,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:15:57,660 INFO L479 AbstractCegarLoop]: Abstraction has 890119 states and 1374114 transitions. [2020-07-21 21:15:57,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:15:57,660 INFO L276 IsEmpty]: Start isEmpty. Operand 890119 states and 1374114 transitions. [2020-07-21 21:16:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 21:16:09,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:16:09,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:16:09,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:16:09,762 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:16:09,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:16:09,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1721157595, now seen corresponding path program 1 times [2020-07-21 21:16:09,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:16:09,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138109583] [2020-07-21 21:16:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:16:10,129 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:16:10,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:16:10,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:16:10,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:16:10,270 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 21:16:10,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:16:10,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138109583] [2020-07-21 21:16:10,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:16:10,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:16:10,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437520908] [2020-07-21 21:16:10,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:16:10,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:16:10,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:16:10,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:16:10,272 INFO L87 Difference]: Start difference. First operand 890119 states and 1374114 transitions. Second operand 9 states.