/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 23:04:07,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 23:04:07,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 23:04:08,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 23:04:08,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 23:04:08,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 23:04:08,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 23:04:08,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 23:04:08,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 23:04:08,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 23:04:08,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 23:04:08,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 23:04:08,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 23:04:08,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 23:04:08,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 23:04:08,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 23:04:08,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 23:04:08,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 23:04:08,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 23:04:08,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 23:04:08,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 23:04:08,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 23:04:08,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 23:04:08,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 23:04:08,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 23:04:08,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 23:04:08,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 23:04:08,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 23:04:08,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 23:04:08,055 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 23:04:08,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 23:04:08,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 23:04:08,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 23:04:08,057 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 23:04:08,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 23:04:08,058 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 23:04:08,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 23:04:08,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 23:04:08,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 23:04:08,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 23:04:08,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 23:04:08,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 23:04:08,059 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 23:04:08,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 23:04:08,059 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 23:04:08,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 23:04:08,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 23:04:08,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 23:04:08,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 23:04:08,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 23:04:08,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:04:08,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 23:04:08,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 23:04:08,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 23:04:08,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 23:04:08,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:08,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 23:04:08,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 23:04:08,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 23:04:08,326 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 23:04:08,344 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 23:04:08,348 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 23:04:08,349 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 23:04:08,349 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 23:04:08,351 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 23:04:08,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d81ea3436/42a28feeb32d433fa2db504805f99fea/FLAG73ef20db5 [2020-07-20 23:04:08,986 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 23:04:08,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 23:04:09,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d81ea3436/42a28feeb32d433fa2db504805f99fea/FLAG73ef20db5 [2020-07-20 23:04:09,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d81ea3436/42a28feeb32d433fa2db504805f99fea [2020-07-20 23:04:09,222 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 23:04:09,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 23:04:09,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 23:04:09,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 23:04:09,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 23:04:09,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:04:09" (1/1) ... [2020-07-20 23:04:09,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506b680a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:09, skipping insertion in model container [2020-07-20 23:04:09,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:04:09" (1/1) ... [2020-07-20 23:04:09,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 23:04:09,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 23:04:10,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:04:10,442 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 23:04:10,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:04:10,929 INFO L208 MainTranslator]: Completed translation [2020-07-20 23:04:10,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:10 WrapperNode [2020-07-20 23:04:10,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 23:04:10,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 23:04:10,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 23:04:10,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 23:04:10,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:10" (1/1) ... [2020-07-20 23:04:10,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:10" (1/1) ... [2020-07-20 23:04:11,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:10" (1/1) ... [2020-07-20 23:04:11,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:10" (1/1) ... [2020-07-20 23:04:11,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:10" (1/1) ... [2020-07-20 23:04:11,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:10" (1/1) ... [2020-07-20 23:04:11,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:10" (1/1) ... [2020-07-20 23:04:11,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 23:04:11,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 23:04:11,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 23:04:11,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 23:04:11,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:04:11,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 23:04:11,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 23:04:11,230 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 23:04:11,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 23:04:11,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 23:04:11,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 23:04:11,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 23:04:11,232 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 23:04:11,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 23:04:11,232 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 23:04:11,233 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 23:04:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 23:04:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 23:04:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 23:04:11,234 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 23:04:11,235 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 23:04:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 23:04:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 23:04:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 23:04:11,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 23:04:11,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 23:04:13,842 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 23:04:13,843 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 23:04:13,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:04:13 BoogieIcfgContainer [2020-07-20 23:04:13,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 23:04:13,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 23:04:13,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 23:04:13,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 23:04:13,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:04:09" (1/3) ... [2020-07-20 23:04:13,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578c2445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:04:13, skipping insertion in model container [2020-07-20 23:04:13,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:04:10" (2/3) ... [2020-07-20 23:04:13,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578c2445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:04:13, skipping insertion in model container [2020-07-20 23:04:13,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:04:13" (3/3) ... [2020-07-20 23:04:13,861 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 23:04:13,871 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 23:04:13,879 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 23:04:13,894 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 23:04:13,921 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 23:04:13,921 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 23:04:13,921 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 23:04:13,921 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 23:04:13,922 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 23:04:13,922 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 23:04:13,922 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 23:04:13,922 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 23:04:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-20 23:04:13,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 23:04:13,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:13,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:13,980 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:13,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:13,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-20 23:04:13,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:13,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385893656] [2020-07-20 23:04:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:14,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:14,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:14,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:14,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:14,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:14,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385893656] [2020-07-20 23:04:14,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:14,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:14,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618000695] [2020-07-20 23:04:14,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:14,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:14,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:14,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:14,835 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-20 23:04:15,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:15,228 INFO L93 Difference]: Finished difference Result 2311 states and 4106 transitions. [2020-07-20 23:04:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:04:15,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-20 23:04:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:15,255 INFO L225 Difference]: With dead ends: 2311 [2020-07-20 23:04:15,256 INFO L226 Difference]: Without dead ends: 1535 [2020-07-20 23:04:15,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2020-07-20 23:04:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1533. [2020-07-20 23:04:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1533 states. [2020-07-20 23:04:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2382 transitions. [2020-07-20 23:04:15,425 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2382 transitions. Word has length 324 [2020-07-20 23:04:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:15,428 INFO L479 AbstractCegarLoop]: Abstraction has 1533 states and 2382 transitions. [2020-07-20 23:04:15,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2382 transitions. [2020-07-20 23:04:15,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 23:04:15,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:15,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:15,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:15,663 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:15,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1039151531, now seen corresponding path program 1 times [2020-07-20 23:04:15,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:15,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534789029] [2020-07-20 23:04:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:16,042 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:16,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:16,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:16,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:16,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:16,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534789029] [2020-07-20 23:04:16,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:16,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:16,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835206976] [2020-07-20 23:04:16,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:16,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:16,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:16,228 INFO L87 Difference]: Start difference. First operand 1533 states and 2382 transitions. Second operand 3 states. [2020-07-20 23:04:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:16,408 INFO L93 Difference]: Finished difference Result 4371 states and 6753 transitions. [2020-07-20 23:04:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:16,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 23:04:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:16,425 INFO L225 Difference]: With dead ends: 4371 [2020-07-20 23:04:16,425 INFO L226 Difference]: Without dead ends: 2965 [2020-07-20 23:04:16,429 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 [2020-07-20 23:04:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-07-20 23:04:16,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2020-07-20 23:04:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2020-07-20 23:04:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4572 transitions. [2020-07-20 23:04:16,593 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4572 transitions. Word has length 326 [2020-07-20 23:04:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:16,594 INFO L479 AbstractCegarLoop]: Abstraction has 2963 states and 4572 transitions. [2020-07-20 23:04:16,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4572 transitions. [2020-07-20 23:04:16,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 23:04:16,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:16,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:16,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:16,819 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:16,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:16,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1642540496, now seen corresponding path program 1 times [2020-07-20 23:04:16,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:16,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645516592] [2020-07-20 23:04:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:17,043 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:17,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:17,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:17,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645516592] [2020-07-20 23:04:17,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:17,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:17,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068533958] [2020-07-20 23:04:17,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:17,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:17,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:17,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:17,128 INFO L87 Difference]: Start difference. First operand 2963 states and 4572 transitions. Second operand 3 states. [2020-07-20 23:04:17,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:17,370 INFO L93 Difference]: Finished difference Result 8707 states and 13399 transitions. [2020-07-20 23:04:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:17,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 23:04:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:17,401 INFO L225 Difference]: With dead ends: 8707 [2020-07-20 23:04:17,401 INFO L226 Difference]: Without dead ends: 5838 [2020-07-20 23:04:17,409 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 [2020-07-20 23:04:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5838 states. [2020-07-20 23:04:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5838 to 2976. [2020-07-20 23:04:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2976 states. [2020-07-20 23:04:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4588 transitions. [2020-07-20 23:04:17,586 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4588 transitions. Word has length 326 [2020-07-20 23:04:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:17,587 INFO L479 AbstractCegarLoop]: Abstraction has 2976 states and 4588 transitions. [2020-07-20 23:04:17,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4588 transitions. [2020-07-20 23:04:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 23:04:17,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:17,596 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] [2020-07-20 23:04:17,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:17,810 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:17,811 INFO L82 PathProgramCache]: Analyzing trace with hash -668412942, now seen corresponding path program 1 times [2020-07-20 23:04:17,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:17,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424112751] [2020-07-20 23:04:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:18,186 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:18,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:18,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:18,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:18,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424112751] [2020-07-20 23:04:18,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:18,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:18,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728700355] [2020-07-20 23:04:18,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:18,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:18,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:18,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:18,334 INFO L87 Difference]: Start difference. First operand 2976 states and 4588 transitions. Second operand 3 states. [2020-07-20 23:04:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:18,539 INFO L93 Difference]: Finished difference Result 8732 states and 13432 transitions. [2020-07-20 23:04:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:18,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-20 23:04:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:18,567 INFO L225 Difference]: With dead ends: 8732 [2020-07-20 23:04:18,567 INFO L226 Difference]: Without dead ends: 5821 [2020-07-20 23:04:18,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5821 states. [2020-07-20 23:04:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5821 to 2992. [2020-07-20 23:04:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2992 states. [2020-07-20 23:04:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 4608 transitions. [2020-07-20 23:04:18,729 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 4608 transitions. Word has length 327 [2020-07-20 23:04:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:18,730 INFO L479 AbstractCegarLoop]: Abstraction has 2992 states and 4608 transitions. [2020-07-20 23:04:18,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 4608 transitions. [2020-07-20 23:04:18,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 23:04:18,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:18,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:18,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:18,953 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:18,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:18,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1292238374, now seen corresponding path program 1 times [2020-07-20 23:04:18,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:18,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942186552] [2020-07-20 23:04:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:19,283 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:19,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:19,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:19,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:19,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:19,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942186552] [2020-07-20 23:04:19,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:19,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:19,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324027563] [2020-07-20 23:04:19,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:19,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:19,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:19,445 INFO L87 Difference]: Start difference. First operand 2992 states and 4608 transitions. Second operand 4 states. [2020-07-20 23:04:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:19,771 INFO L93 Difference]: Finished difference Result 8821 states and 13563 transitions. [2020-07-20 23:04:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:19,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 23:04:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:19,798 INFO L225 Difference]: With dead ends: 8821 [2020-07-20 23:04:19,799 INFO L226 Difference]: Without dead ends: 5848 [2020-07-20 23:04:19,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:19,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2020-07-20 23:04:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 5846. [2020-07-20 23:04:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5846 states. [2020-07-20 23:04:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5846 states to 5846 states and 8935 transitions. [2020-07-20 23:04:20,114 INFO L78 Accepts]: Start accepts. Automaton has 5846 states and 8935 transitions. Word has length 328 [2020-07-20 23:04:20,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:20,116 INFO L479 AbstractCegarLoop]: Abstraction has 5846 states and 8935 transitions. [2020-07-20 23:04:20,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:20,116 INFO L276 IsEmpty]: Start isEmpty. Operand 5846 states and 8935 transitions. [2020-07-20 23:04:20,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 23:04:20,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:20,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:20,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:20,347 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2041580659, now seen corresponding path program 1 times [2020-07-20 23:04:20,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:20,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965602441] [2020-07-20 23:04:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:20,691 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:20,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:20,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:20,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:20,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:20,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965602441] [2020-07-20 23:04:20,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:20,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:20,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639148829] [2020-07-20 23:04:20,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:20,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:20,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:20,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:20,799 INFO L87 Difference]: Start difference. First operand 5846 states and 8935 transitions. Second operand 3 states. [2020-07-20 23:04:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:21,197 INFO L93 Difference]: Finished difference Result 16935 states and 25824 transitions. [2020-07-20 23:04:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:21,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 23:04:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:21,248 INFO L225 Difference]: With dead ends: 16935 [2020-07-20 23:04:21,248 INFO L226 Difference]: Without dead ends: 11399 [2020-07-20 23:04:21,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2020-07-20 23:04:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 11397. [2020-07-20 23:04:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11397 states. [2020-07-20 23:04:21,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11397 states to 11397 states and 17310 transitions. [2020-07-20 23:04:21,717 INFO L78 Accepts]: Start accepts. Automaton has 11397 states and 17310 transitions. Word has length 330 [2020-07-20 23:04:21,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:21,718 INFO L479 AbstractCegarLoop]: Abstraction has 11397 states and 17310 transitions. [2020-07-20 23:04:21,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:21,718 INFO L276 IsEmpty]: Start isEmpty. Operand 11397 states and 17310 transitions. [2020-07-20 23:04:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 23:04:21,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:21,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:21,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:21,956 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:21,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:21,957 INFO L82 PathProgramCache]: Analyzing trace with hash -20555784, now seen corresponding path program 1 times [2020-07-20 23:04:21,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:21,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032167244] [2020-07-20 23:04:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:22,179 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:22,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:22,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:22,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:22,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:22,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032167244] [2020-07-20 23:04:22,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:22,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:22,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925206462] [2020-07-20 23:04:22,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:22,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:22,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:22,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:22,252 INFO L87 Difference]: Start difference. First operand 11397 states and 17310 transitions. Second operand 3 states. [2020-07-20 23:04:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:22,865 INFO L93 Difference]: Finished difference Result 34141 states and 51856 transitions. [2020-07-20 23:04:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:22,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 23:04:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:22,913 INFO L225 Difference]: With dead ends: 34141 [2020-07-20 23:04:22,913 INFO L226 Difference]: Without dead ends: 22759 [2020-07-20 23:04:22,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22759 states. [2020-07-20 23:04:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22759 to 11408. [2020-07-20 23:04:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11408 states. [2020-07-20 23:04:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11408 states to 11408 states and 17326 transitions. [2020-07-20 23:04:24,151 INFO L78 Accepts]: Start accepts. Automaton has 11408 states and 17326 transitions. Word has length 330 [2020-07-20 23:04:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:24,151 INFO L479 AbstractCegarLoop]: Abstraction has 11408 states and 17326 transitions. [2020-07-20 23:04:24,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 11408 states and 17326 transitions. [2020-07-20 23:04:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 23:04:24,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:24,179 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] [2020-07-20 23:04:24,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:24,395 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:24,395 INFO L82 PathProgramCache]: Analyzing trace with hash 542686770, now seen corresponding path program 1 times [2020-07-20 23:04:24,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:24,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666859195] [2020-07-20 23:04:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:24,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:24,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:24,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:24,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:24,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666859195] [2020-07-20 23:04:24,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:24,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:24,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946715202] [2020-07-20 23:04:24,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:24,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:24,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:24,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:24,755 INFO L87 Difference]: Start difference. First operand 11408 states and 17326 transitions. Second operand 3 states. [2020-07-20 23:04:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:25,333 INFO L93 Difference]: Finished difference Result 33927 states and 51499 transitions. [2020-07-20 23:04:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:25,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-20 23:04:25,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:25,364 INFO L225 Difference]: With dead ends: 33927 [2020-07-20 23:04:25,364 INFO L226 Difference]: Without dead ends: 22565 [2020-07-20 23:04:25,385 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 [2020-07-20 23:04:25,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22565 states. [2020-07-20 23:04:25,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22565 to 11418. [2020-07-20 23:04:25,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11418 states. [2020-07-20 23:04:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11418 states to 11418 states and 17339 transitions. [2020-07-20 23:04:25,874 INFO L78 Accepts]: Start accepts. Automaton has 11418 states and 17339 transitions. Word has length 331 [2020-07-20 23:04:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:25,875 INFO L479 AbstractCegarLoop]: Abstraction has 11418 states and 17339 transitions. [2020-07-20 23:04:25,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:25,875 INFO L276 IsEmpty]: Start isEmpty. Operand 11418 states and 17339 transitions. [2020-07-20 23:04:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 23:04:25,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:25,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:26,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:26,109 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:26,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1342438638, now seen corresponding path program 1 times [2020-07-20 23:04:26,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:26,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781854817] [2020-07-20 23:04:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:26,384 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:26,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:26,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:26,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781854817] [2020-07-20 23:04:26,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:26,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:26,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497950150] [2020-07-20 23:04:26,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:26,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:26,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:26,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:26,600 INFO L87 Difference]: Start difference. First operand 11418 states and 17339 transitions. Second operand 3 states. [2020-07-20 23:04:27,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:27,179 INFO L93 Difference]: Finished difference Result 32765 states and 49536 transitions. [2020-07-20 23:04:27,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:27,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 23:04:27,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:27,207 INFO L225 Difference]: With dead ends: 32765 [2020-07-20 23:04:27,207 INFO L226 Difference]: Without dead ends: 22175 [2020-07-20 23:04:27,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22175 states. [2020-07-20 23:04:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22175 to 22173. [2020-07-20 23:04:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22173 states. [2020-07-20 23:04:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22173 states to 22173 states and 33439 transitions. [2020-07-20 23:04:28,056 INFO L78 Accepts]: Start accepts. Automaton has 22173 states and 33439 transitions. Word has length 332 [2020-07-20 23:04:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:28,057 INFO L479 AbstractCegarLoop]: Abstraction has 22173 states and 33439 transitions. [2020-07-20 23:04:28,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 22173 states and 33439 transitions. [2020-07-20 23:04:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 23:04:28,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:28,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:28,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:28,301 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:28,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:28,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1146508341, now seen corresponding path program 1 times [2020-07-20 23:04:28,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:28,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114039263] [2020-07-20 23:04:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:28,512 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:28,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:28,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:04:28,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:28,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:28,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114039263] [2020-07-20 23:04:28,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:28,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:28,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783222577] [2020-07-20 23:04:28,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:28,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:28,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:28,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:28,606 INFO L87 Difference]: Start difference. First operand 22173 states and 33439 transitions. Second operand 4 states. [2020-07-20 23:04:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:29,662 INFO L93 Difference]: Finished difference Result 61305 states and 91884 transitions. [2020-07-20 23:04:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:29,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 23:04:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:29,700 INFO L225 Difference]: With dead ends: 61305 [2020-07-20 23:04:29,700 INFO L226 Difference]: Without dead ends: 40729 [2020-07-20 23:04:29,743 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 [2020-07-20 23:04:29,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40729 states. [2020-07-20 23:04:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40729 to 22759. [2020-07-20 23:04:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22759 states. [2020-07-20 23:04:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22759 states to 22759 states and 34396 transitions. [2020-07-20 23:04:31,334 INFO L78 Accepts]: Start accepts. Automaton has 22759 states and 34396 transitions. Word has length 332 [2020-07-20 23:04:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:31,335 INFO L479 AbstractCegarLoop]: Abstraction has 22759 states and 34396 transitions. [2020-07-20 23:04:31,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 22759 states and 34396 transitions. [2020-07-20 23:04:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 23:04:31,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:31,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:31,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:31,557 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:31,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1898806347, now seen corresponding path program 1 times [2020-07-20 23:04:31,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:31,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089276703] [2020-07-20 23:04:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:31,817 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:31,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:31,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:31,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:31,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089276703] [2020-07-20 23:04:31,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:31,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:31,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418000185] [2020-07-20 23:04:31,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:31,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:31,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:31,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:31,890 INFO L87 Difference]: Start difference. First operand 22759 states and 34396 transitions. Second operand 3 states. [2020-07-20 23:04:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:32,872 INFO L93 Difference]: Finished difference Result 48459 states and 73566 transitions. [2020-07-20 23:04:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:32,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 23:04:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:32,904 INFO L225 Difference]: With dead ends: 48459 [2020-07-20 23:04:32,904 INFO L226 Difference]: Without dead ends: 31721 [2020-07-20 23:04:32,921 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 [2020-07-20 23:04:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31721 states. [2020-07-20 23:04:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31721 to 26535. [2020-07-20 23:04:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26535 states. [2020-07-20 23:04:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26535 states to 26535 states and 40508 transitions. [2020-07-20 23:04:33,978 INFO L78 Accepts]: Start accepts. Automaton has 26535 states and 40508 transitions. Word has length 334 [2020-07-20 23:04:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:33,979 INFO L479 AbstractCegarLoop]: Abstraction has 26535 states and 40508 transitions. [2020-07-20 23:04:33,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 26535 states and 40508 transitions. [2020-07-20 23:04:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 23:04:33,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:33,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:34,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:34,197 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:34,198 INFO L82 PathProgramCache]: Analyzing trace with hash -839368007, now seen corresponding path program 1 times [2020-07-20 23:04:34,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:34,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758956914] [2020-07-20 23:04:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:34,412 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:34,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:34,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:34,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:34,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:34,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758956914] [2020-07-20 23:04:34,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:34,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:34,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18763053] [2020-07-20 23:04:34,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:34,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:34,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:34,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:34,495 INFO L87 Difference]: Start difference. First operand 26535 states and 40508 transitions. Second operand 3 states. [2020-07-20 23:04:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:36,543 INFO L93 Difference]: Finished difference Result 75447 states and 114364 transitions. [2020-07-20 23:04:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:04:36,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 23:04:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:36,592 INFO L225 Difference]: With dead ends: 75447 [2020-07-20 23:04:36,592 INFO L226 Difference]: Without dead ends: 50975 [2020-07-20 23:04:36,620 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 [2020-07-20 23:04:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50975 states. [2020-07-20 23:04:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50975 to 26893. [2020-07-20 23:04:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26893 states. [2020-07-20 23:04:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26893 states to 26893 states and 40998 transitions. [2020-07-20 23:04:37,799 INFO L78 Accepts]: Start accepts. Automaton has 26893 states and 40998 transitions. Word has length 334 [2020-07-20 23:04:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:37,799 INFO L479 AbstractCegarLoop]: Abstraction has 26893 states and 40998 transitions. [2020-07-20 23:04:37,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:04:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 26893 states and 40998 transitions. [2020-07-20 23:04:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 23:04:37,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:37,820 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] [2020-07-20 23:04:38,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:38,030 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:38,031 INFO L82 PathProgramCache]: Analyzing trace with hash -186517998, now seen corresponding path program 1 times [2020-07-20 23:04:38,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:38,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032642703] [2020-07-20 23:04:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:38,255 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:38,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:38,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:38,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:38,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032642703] [2020-07-20 23:04:38,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:38,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:38,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142552606] [2020-07-20 23:04:38,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:38,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:38,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:38,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:38,364 INFO L87 Difference]: Start difference. First operand 26893 states and 40998 transitions. Second operand 4 states. [2020-07-20 23:04:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:39,992 INFO L93 Difference]: Finished difference Result 59578 states and 90530 transitions. [2020-07-20 23:04:39,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:39,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-20 23:04:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:40,019 INFO L225 Difference]: With dead ends: 59578 [2020-07-20 23:04:40,019 INFO L226 Difference]: Without dead ends: 29785 [2020-07-20 23:04:40,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:40,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29785 states. [2020-07-20 23:04:40,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29785 to 29783. [2020-07-20 23:04:40,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29783 states. [2020-07-20 23:04:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29783 states to 29783 states and 44983 transitions. [2020-07-20 23:04:41,007 INFO L78 Accepts]: Start accepts. Automaton has 29783 states and 44983 transitions. Word has length 335 [2020-07-20 23:04:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:41,007 INFO L479 AbstractCegarLoop]: Abstraction has 29783 states and 44983 transitions. [2020-07-20 23:04:41,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 29783 states and 44983 transitions. [2020-07-20 23:04:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 23:04:41,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:41,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:41,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:41,247 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:41,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:41,248 INFO L82 PathProgramCache]: Analyzing trace with hash -634620322, now seen corresponding path program 1 times [2020-07-20 23:04:41,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:41,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968936042] [2020-07-20 23:04:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:41,478 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:04:41,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:41,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:04:41,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:41,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:41,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968936042] [2020-07-20 23:04:41,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:41,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 23:04:41,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832802815] [2020-07-20 23:04:41,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 23:04:41,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:41,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 23:04:41,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 23:04:41,800 INFO L87 Difference]: Start difference. First operand 29783 states and 44983 transitions. Second operand 9 states. [2020-07-20 23:04:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:52,966 INFO L93 Difference]: Finished difference Result 157073 states and 242680 transitions. [2020-07-20 23:04:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 23:04:52,966 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 336 [2020-07-20 23:04:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:53,192 INFO L225 Difference]: With dead ends: 157073 [2020-07-20 23:04:53,192 INFO L226 Difference]: Without dead ends: 150519 [2020-07-20 23:04:53,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 23:04:53,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150519 states. [2020-07-20 23:04:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150519 to 71367. [2020-07-20 23:04:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71367 states. [2020-07-20 23:04:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71367 states to 71367 states and 109495 transitions. [2020-07-20 23:04:57,259 INFO L78 Accepts]: Start accepts. Automaton has 71367 states and 109495 transitions. Word has length 336 [2020-07-20 23:04:57,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:57,259 INFO L479 AbstractCegarLoop]: Abstraction has 71367 states and 109495 transitions. [2020-07-20 23:04:57,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 23:04:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 71367 states and 109495 transitions. [2020-07-20 23:04:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 23:04:57,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:57,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:57,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:57,493 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:57,493 INFO L82 PathProgramCache]: Analyzing trace with hash 242420880, now seen corresponding path program 1 times [2020-07-20 23:04:57,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:57,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182950264] [2020-07-20 23:04:57,495 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:57,747 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:04:57,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:04:57,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:04:57,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:57,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182950264] [2020-07-20 23:04:57,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:57,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:04:57,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834222239] [2020-07-20 23:04:57,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:04:57,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:57,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:04:57,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:04:57,831 INFO L87 Difference]: Start difference. First operand 71367 states and 109495 transitions. Second operand 3 states. [2020-07-20 23:05:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:04,267 INFO L93 Difference]: Finished difference Result 162811 states and 252417 transitions. [2020-07-20 23:05:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:05:04,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 23:05:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:04,373 INFO L225 Difference]: With dead ends: 162811 [2020-07-20 23:05:04,373 INFO L226 Difference]: Without dead ends: 100857 [2020-07-20 23:05:04,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:05:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100857 states. [2020-07-20 23:05:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100857 to 91583. [2020-07-20 23:05:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91583 states. [2020-07-20 23:05:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91583 states to 91583 states and 142079 transitions. [2020-07-20 23:05:08,897 INFO L78 Accepts]: Start accepts. Automaton has 91583 states and 142079 transitions. Word has length 336 [2020-07-20 23:05:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:08,898 INFO L479 AbstractCegarLoop]: Abstraction has 91583 states and 142079 transitions. [2020-07-20 23:05:08,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:05:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 91583 states and 142079 transitions. [2020-07-20 23:05:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 23:05:09,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:09,214 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] [2020-07-20 23:05:09,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:09,415 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1669415160, now seen corresponding path program 1 times [2020-07-20 23:05:09,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:09,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583425572] [2020-07-20 23:05:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:09,630 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:05:09,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:05:09,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:09,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:09,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583425572] [2020-07-20 23:05:09,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:09,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:05:09,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385733527] [2020-07-20 23:05:09,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:05:09,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:09,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:05:09,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:05:09,702 INFO L87 Difference]: Start difference. First operand 91583 states and 142079 transitions. Second operand 4 states. [2020-07-20 23:05:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:19,431 INFO L93 Difference]: Finished difference Result 272130 states and 421905 transitions. [2020-07-20 23:05:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:05:19,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 23:05:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:19,640 INFO L225 Difference]: With dead ends: 272130 [2020-07-20 23:05:19,640 INFO L226 Difference]: Without dead ends: 183014 [2020-07-20 23:05:19,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:05:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183014 states. [2020-07-20 23:05:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183014 to 94622. [2020-07-20 23:05:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94622 states. [2020-07-20 23:05:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94622 states to 94622 states and 146863 transitions. [2020-07-20 23:05:27,674 INFO L78 Accepts]: Start accepts. Automaton has 94622 states and 146863 transitions. Word has length 337 [2020-07-20 23:05:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:27,674 INFO L479 AbstractCegarLoop]: Abstraction has 94622 states and 146863 transitions. [2020-07-20 23:05:27,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:05:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 94622 states and 146863 transitions. [2020-07-20 23:05:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 23:05:27,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:27,708 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] [2020-07-20 23:05:27,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:27,918 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:27,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:27,919 INFO L82 PathProgramCache]: Analyzing trace with hash 35257363, now seen corresponding path program 1 times [2020-07-20 23:05:27,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:27,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259699794] [2020-07-20 23:05:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:28,185 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:05:28,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:28,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:05:28,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:28,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:28,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259699794] [2020-07-20 23:05:28,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:28,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:05:28,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201298683] [2020-07-20 23:05:28,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:05:28,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:28,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:05:28,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:05:28,295 INFO L87 Difference]: Start difference. First operand 94622 states and 146863 transitions. Second operand 4 states. [2020-07-20 23:05:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:37,760 INFO L93 Difference]: Finished difference Result 272196 states and 421738 transitions. [2020-07-20 23:05:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:05:37,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 23:05:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:37,954 INFO L225 Difference]: With dead ends: 272196 [2020-07-20 23:05:37,954 INFO L226 Difference]: Without dead ends: 178602 [2020-07-20 23:05:38,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:05:38,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178602 states. [2020-07-20 23:05:50,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178602 to 178600. [2020-07-20 23:05:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178600 states. [2020-07-20 23:05:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178600 states to 178600 states and 275136 transitions. [2020-07-20 23:05:51,132 INFO L78 Accepts]: Start accepts. Automaton has 178600 states and 275136 transitions. Word has length 337 [2020-07-20 23:05:51,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:51,132 INFO L479 AbstractCegarLoop]: Abstraction has 178600 states and 275136 transitions. [2020-07-20 23:05:51,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:05:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 178600 states and 275136 transitions. [2020-07-20 23:05:51,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 23:05:51,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:51,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:51,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:51,396 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:51,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1152305329, now seen corresponding path program 1 times [2020-07-20 23:05:51,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:51,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364009053] [2020-07-20 23:05:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:51,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:05:51,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:51,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:05:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:05:51,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:51,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364009053] [2020-07-20 23:05:51,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:51,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:05:51,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14834448] [2020-07-20 23:05:51,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:05:51,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:51,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:05:51,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:05:51,688 INFO L87 Difference]: Start difference. First operand 178600 states and 275136 transitions. Second operand 4 states. [2020-07-20 23:06:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:06:14,288 INFO L93 Difference]: Finished difference Result 524948 states and 808147 transitions. [2020-07-20 23:06:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:06:14,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-20 23:06:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:06:15,123 INFO L225 Difference]: With dead ends: 524948 [2020-07-20 23:06:15,123 INFO L226 Difference]: Without dead ends: 356586 [2020-07-20 23:06:15,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:06:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356586 states. [2020-07-20 23:06:32,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356586 to 189164. [2020-07-20 23:06:32,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189164 states. [2020-07-20 23:06:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189164 states to 189164 states and 291908 transitions. [2020-07-20 23:06:32,932 INFO L78 Accepts]: Start accepts. Automaton has 189164 states and 291908 transitions. Word has length 339 [2020-07-20 23:06:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:06:32,932 INFO L479 AbstractCegarLoop]: Abstraction has 189164 states and 291908 transitions. [2020-07-20 23:06:32,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:06:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 189164 states and 291908 transitions. [2020-07-20 23:06:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 23:06:33,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:06:33,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:06:33,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:33,211 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:06:33,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:06:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash 938891380, now seen corresponding path program 1 times [2020-07-20 23:06:33,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:06:33,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831898284] [2020-07-20 23:06:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:33,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:06:33,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:06:33,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:06:33,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:06:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:06:33,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:06:33,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831898284] [2020-07-20 23:06:33,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:06:33,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:06:33,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069543760] [2020-07-20 23:06:33,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:06:33,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:06:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:06:33,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:06:33,917 INFO L87 Difference]: Start difference. First operand 189164 states and 291908 transitions. Second operand 4 states. [2020-07-20 23:06:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:06:59,082 INFO L93 Difference]: Finished difference Result 551592 states and 849999 transitions. [2020-07-20 23:06:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:06:59,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-20 23:06:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:06:59,507 INFO L225 Difference]: With dead ends: 551592 [2020-07-20 23:06:59,507 INFO L226 Difference]: Without dead ends: 364874 [2020-07-20 23:06:59,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:06:59,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364874 states. [2020-07-20 23:07:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364874 to 364872. [2020-07-20 23:07:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364872 states. [2020-07-20 23:07:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364872 states to 364872 states and 558128 transitions. [2020-07-20 23:07:30,041 INFO L78 Accepts]: Start accepts. Automaton has 364872 states and 558128 transitions. Word has length 339 [2020-07-20 23:07:30,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:07:30,041 INFO L479 AbstractCegarLoop]: Abstraction has 364872 states and 558128 transitions. [2020-07-20 23:07:30,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:07:30,042 INFO L276 IsEmpty]: Start isEmpty. Operand 364872 states and 558128 transitions. [2020-07-20 23:07:30,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 23:07:30,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:07:30,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:07:30,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:07:30,398 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:07:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:07:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash -169039306, now seen corresponding path program 1 times [2020-07-20 23:07:30,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:07:30,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817632819] [2020-07-20 23:07:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:07:30,652 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:07:30,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:07:30,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:07:30,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:07:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:07:30,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:07:30,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817632819] [2020-07-20 23:07:30,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:07:30,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:07:30,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408439281] [2020-07-20 23:07:30,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:07:30,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:07:30,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:07:30,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:07:30,733 INFO L87 Difference]: Start difference. First operand 364872 states and 558128 transitions. Second operand 3 states. [2020-07-20 23:08:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:26,679 INFO L93 Difference]: Finished difference Result 1042564 states and 1590908 transitions. [2020-07-20 23:08:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:08:26,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-20 23:08:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:27,562 INFO L225 Difference]: With dead ends: 1042564 [2020-07-20 23:08:27,563 INFO L226 Difference]: Without dead ends: 689954 [2020-07-20 23:08:27,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689954 states. [2020-07-20 23:09:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689954 to 689952. [2020-07-20 23:09:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 689952 states. [2020-07-20 23:09:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689952 states to 689952 states and 1047384 transitions. [2020-07-20 23:09:33,637 INFO L78 Accepts]: Start accepts. Automaton has 689952 states and 1047384 transitions. Word has length 341 [2020-07-20 23:09:33,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:33,638 INFO L479 AbstractCegarLoop]: Abstraction has 689952 states and 1047384 transitions. [2020-07-20 23:09:33,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 689952 states and 1047384 transitions. [2020-07-20 23:09:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 23:09:35,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:35,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:09:35,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:35,227 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:35,228 INFO L82 PathProgramCache]: Analyzing trace with hash -103226864, now seen corresponding path program 1 times [2020-07-20 23:09:35,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:35,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463465010] [2020-07-20 23:09:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:35,443 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:09:35,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:35,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:09:35,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:35,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:35,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463465010] [2020-07-20 23:09:35,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:35,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:09:35,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925969323] [2020-07-20 23:09:35,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:09:35,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:35,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:09:35,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:09:35,497 INFO L87 Difference]: Start difference. First operand 689952 states and 1047384 transitions. Second operand 4 states. [2020-07-20 23:11:37,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:37,572 INFO L93 Difference]: Finished difference Result 1978388 states and 2998482 transitions. [2020-07-20 23:11:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:37,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2020-07-20 23:11:37,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:39,383 INFO L225 Difference]: With dead ends: 1978388 [2020-07-20 23:11:39,383 INFO L226 Difference]: Without dead ends: 1360906 [2020-07-20 23:11:41,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:11:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360906 states. [2020-07-20 23:12:53,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360906 to 748544. [2020-07-20 23:12:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748544 states. [2020-07-20 23:12:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748544 states to 748544 states and 1138936 transitions. [2020-07-20 23:12:54,693 INFO L78 Accepts]: Start accepts. Automaton has 748544 states and 1138936 transitions. Word has length 341 [2020-07-20 23:12:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:12:54,693 INFO L479 AbstractCegarLoop]: Abstraction has 748544 states and 1138936 transitions. [2020-07-20 23:12:54,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:12:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 748544 states and 1138936 transitions. [2020-07-20 23:12:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 23:12:55,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:12:55,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:12:55,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:55,261 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:12:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:12:55,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1542719557, now seen corresponding path program 1 times [2020-07-20 23:12:55,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:12:55,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067708021] [2020-07-20 23:12:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:56,377 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:12:56,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:12:56,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:12:56,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:12:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:12:56,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:12:56,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067708021] [2020-07-20 23:12:56,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:12:56,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:12:56,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622191262] [2020-07-20 23:12:56,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:12:56,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:12:56,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:12:56,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:12:56,460 INFO L87 Difference]: Start difference. First operand 748544 states and 1138936 transitions. Second operand 3 states. [2020-07-20 23:15:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:15:04,217 INFO L93 Difference]: Finished difference Result 2211946 states and 3364256 transitions. [2020-07-20 23:15:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:15:04,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-20 23:15:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:15:06,319 INFO L225 Difference]: With dead ends: 2211946 [2020-07-20 23:15:06,319 INFO L226 Difference]: Without dead ends: 1477852 [2020-07-20 23:15:06,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:15:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477852 states.