/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:40:10,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:40:10,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:40:10,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:40:10,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:40:10,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:40:10,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:40:10,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:40:10,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:40:10,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:40:10,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:40:10,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:40:10,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:40:10,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:40:10,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:40:10,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:40:10,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:40:10,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:40:10,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:40:10,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:40:10,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:40:10,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:40:10,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:40:10,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:40:10,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:40:10,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:40:10,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:40:10,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:40:10,581 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 12:40:10,595 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:40:10,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:40:10,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:40:10,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:40:10,597 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:40:10,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:40:10,597 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:40:10,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:40:10,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:40:10,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:40:10,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:40:10,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:40:10,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:40:10,601 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:40:10,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:40:10,601 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:40:10,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:40:10,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:40:10,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:40:10,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:40:10,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:40:10,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:40:10,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:40:10,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:40:10,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:40:10,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:40:10,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:10,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:40:10,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:40:10,604 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 -> NOT_INCREMENTALLY [2020-07-20 12:40:10,913 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:40:10,927 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:40:10,931 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:40:10,932 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:40:10,933 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:40:10,934 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 12:40:11,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ee134d2/5aa54fb069ec436aa66563905f492c64/FLAG25acbb053 [2020-07-20 12:40:11,855 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:40:11,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 12:40:11,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ee134d2/5aa54fb069ec436aa66563905f492c64/FLAG25acbb053 [2020-07-20 12:40:12,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ee134d2/5aa54fb069ec436aa66563905f492c64 [2020-07-20 12:40:12,344 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:40:12,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:40:12,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:40:12,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:40:12,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:40:12,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:40:12" (1/1) ... [2020-07-20 12:40:12,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4711bde3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:12, skipping insertion in model container [2020-07-20 12:40:12,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:40:12" (1/1) ... [2020-07-20 12:40:12,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:40:12,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:40:14,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:40:14,908 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:40:16,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:40:16,686 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:40:16,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:16 WrapperNode [2020-07-20 12:40:16,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:40:16,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:40:16,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:40:16,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:40:16,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:16" (1/1) ... [2020-07-20 12:40:16,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:16" (1/1) ... [2020-07-20 12:40:16,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:16" (1/1) ... [2020-07-20 12:40:16,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:16" (1/1) ... [2020-07-20 12:40:16,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:16" (1/1) ... [2020-07-20 12:40:16,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:16" (1/1) ... [2020-07-20 12:40:16,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:16" (1/1) ... [2020-07-20 12:40:17,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:40:17,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:40:17,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:40:17,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:40:17,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:16" (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 12:40:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:40:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:40:17,211 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:40:17,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:40:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:40:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 12:40:17,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 12:40:17,213 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 12:40:17,214 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:40:17,214 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:40:17,214 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 12:40:17,215 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 12:40:17,216 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 12:40:17,216 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 12:40:17,216 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 12:40:17,217 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 12:40:17,217 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 12:40:17,218 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 12:40:17,218 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 12:40:17,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:40:17,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:40:17,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:40:23,848 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:40:23,848 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 12:40:23,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:40:23 BoogieIcfgContainer [2020-07-20 12:40:23,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:40:23,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:40:23,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:40:23,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:40:23,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:40:12" (1/3) ... [2020-07-20 12:40:23,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238e3de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:40:23, skipping insertion in model container [2020-07-20 12:40:23,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:16" (2/3) ... [2020-07-20 12:40:23,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238e3de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:40:23, skipping insertion in model container [2020-07-20 12:40:23,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:40:23" (3/3) ... [2020-07-20 12:40:23,875 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 12:40:23,886 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:40:23,897 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 12:40:23,912 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 12:40:23,947 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:40:23,948 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:40:23,948 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:40:23,948 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:40:23,948 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:40:23,948 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:40:23,949 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:40:23,949 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:40:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-07-20 12:40:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-20 12:40:24,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:24,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:24,037 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-07-20 12:40:24,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:24,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922014807] [2020-07-20 12:40:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:24,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 2931 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:40:24,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:25,031 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 12:40:25,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:25,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922014807] [2020-07-20 12:40:25,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:25,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:25,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544557772] [2020-07-20 12:40:25,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:25,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:25,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:25,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:25,058 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 3 states. [2020-07-20 12:40:25,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:25,490 INFO L93 Difference]: Finished difference Result 5960 states and 10322 transitions. [2020-07-20 12:40:25,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:25,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 322 [2020-07-20 12:40:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:25,536 INFO L225 Difference]: With dead ends: 5960 [2020-07-20 12:40:25,536 INFO L226 Difference]: Without dead ends: 4221 [2020-07-20 12:40:25,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2020-07-20 12:40:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 4121. [2020-07-20 12:40:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4121 states. [2020-07-20 12:40:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 7128 transitions. [2020-07-20 12:40:25,755 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 7128 transitions. Word has length 322 [2020-07-20 12:40:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:25,756 INFO L479 AbstractCegarLoop]: Abstraction has 4121 states and 7128 transitions. [2020-07-20 12:40:25,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 7128 transitions. [2020-07-20 12:40:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 12:40:25,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:25,770 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 12:40:25,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:25,984 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:25,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:25,985 INFO L82 PathProgramCache]: Analyzing trace with hash -24233743, now seen corresponding path program 1 times [2020-07-20 12:40:25,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:25,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702294207] [2020-07-20 12:40:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:26,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 2975 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:40:26,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:26,757 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 12:40:26,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:26,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702294207] [2020-07-20 12:40:26,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:26,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:26,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557749217] [2020-07-20 12:40:26,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:26,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:26,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:26,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:26,762 INFO L87 Difference]: Start difference. First operand 4121 states and 7128 transitions. Second operand 3 states. [2020-07-20 12:40:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:27,183 INFO L93 Difference]: Finished difference Result 10257 states and 17622 transitions. [2020-07-20 12:40:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:27,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-20 12:40:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:27,238 INFO L225 Difference]: With dead ends: 10257 [2020-07-20 12:40:27,239 INFO L226 Difference]: Without dead ends: 7153 [2020-07-20 12:40:27,255 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 12:40:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7153 states. [2020-07-20 12:40:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7153 to 6957. [2020-07-20 12:40:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6957 states. [2020-07-20 12:40:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 11956 transitions. [2020-07-20 12:40:27,643 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 11956 transitions. Word has length 342 [2020-07-20 12:40:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:27,645 INFO L479 AbstractCegarLoop]: Abstraction has 6957 states and 11956 transitions. [2020-07-20 12:40:27,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 11956 transitions. [2020-07-20 12:40:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-07-20 12:40:27,686 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:27,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:27,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:27,907 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:27,909 INFO L82 PathProgramCache]: Analyzing trace with hash 828287305, now seen corresponding path program 1 times [2020-07-20 12:40:27,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:27,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78688215] [2020-07-20 12:40:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 3019 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:40:28,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:28,717 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 12:40:28,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:28,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78688215] [2020-07-20 12:40:28,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:28,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:28,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088120152] [2020-07-20 12:40:28,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:28,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:28,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:28,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:28,721 INFO L87 Difference]: Start difference. First operand 6957 states and 11956 transitions. Second operand 3 states. [2020-07-20 12:40:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:29,166 INFO L93 Difference]: Finished difference Result 12233 states and 20952 transitions. [2020-07-20 12:40:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:29,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 362 [2020-07-20 12:40:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:29,217 INFO L225 Difference]: With dead ends: 12233 [2020-07-20 12:40:29,217 INFO L226 Difference]: Without dead ends: 6961 [2020-07-20 12:40:29,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 360 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 12:40:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2020-07-20 12:40:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 6957. [2020-07-20 12:40:29,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6957 states. [2020-07-20 12:40:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 11940 transitions. [2020-07-20 12:40:29,698 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 11940 transitions. Word has length 362 [2020-07-20 12:40:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:29,699 INFO L479 AbstractCegarLoop]: Abstraction has 6957 states and 11940 transitions. [2020-07-20 12:40:29,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 11940 transitions. [2020-07-20 12:40:29,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-07-20 12:40:29,731 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:29,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:40:29,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:29,946 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash -272409415, now seen corresponding path program 1 times [2020-07-20 12:40:29,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:29,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727670686] [2020-07-20 12:40:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:30,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 3019 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:40:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:30,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:30,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727670686] [2020-07-20 12:40:30,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:30,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:30,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869790087] [2020-07-20 12:40:30,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:30,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:30,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:30,794 INFO L87 Difference]: Start difference. First operand 6957 states and 11940 transitions. Second operand 3 states. [2020-07-20 12:40:31,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:31,171 INFO L93 Difference]: Finished difference Result 17761 states and 30370 transitions. [2020-07-20 12:40:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:31,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 362 [2020-07-20 12:40:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:31,231 INFO L225 Difference]: With dead ends: 17761 [2020-07-20 12:40:31,231 INFO L226 Difference]: Without dead ends: 12249 [2020-07-20 12:40:31,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 360 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 12:40:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12249 states. [2020-07-20 12:40:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12249 to 11861. [2020-07-20 12:40:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11861 states. [2020-07-20 12:40:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 20252 transitions. [2020-07-20 12:40:31,752 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 20252 transitions. Word has length 362 [2020-07-20 12:40:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:31,752 INFO L479 AbstractCegarLoop]: Abstraction has 11861 states and 20252 transitions. [2020-07-20 12:40:31,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 20252 transitions. [2020-07-20 12:40:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-07-20 12:40:31,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:31,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:32,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:32,001 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1152939603, now seen corresponding path program 1 times [2020-07-20 12:40:32,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:32,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795713968] [2020-07-20 12:40:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:32,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 3063 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:40:32,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:32,746 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 12:40:32,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:32,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795713968] [2020-07-20 12:40:32,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:32,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:32,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5196833] [2020-07-20 12:40:32,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:32,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:32,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:32,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:32,749 INFO L87 Difference]: Start difference. First operand 11861 states and 20252 transitions. Second operand 3 states. [2020-07-20 12:40:33,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:33,084 INFO L93 Difference]: Finished difference Result 21097 states and 35954 transitions. [2020-07-20 12:40:33,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:33,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 382 [2020-07-20 12:40:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:33,116 INFO L225 Difference]: With dead ends: 21097 [2020-07-20 12:40:33,116 INFO L226 Difference]: Without dead ends: 11865 [2020-07-20 12:40:33,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 380 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 12:40:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11865 states. [2020-07-20 12:40:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11865 to 11861. [2020-07-20 12:40:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11861 states. [2020-07-20 12:40:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 20220 transitions. [2020-07-20 12:40:34,368 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 20220 transitions. Word has length 382 [2020-07-20 12:40:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:34,374 INFO L479 AbstractCegarLoop]: Abstraction has 11861 states and 20220 transitions. [2020-07-20 12:40:34,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 20220 transitions. [2020-07-20 12:40:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-07-20 12:40:34,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:34,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:34,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:34,619 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:34,619 INFO L82 PathProgramCache]: Analyzing trace with hash -17279031, now seen corresponding path program 1 times [2020-07-20 12:40:34,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:34,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930894746] [2020-07-20 12:40:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 3063 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:40:35,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:35,377 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 12:40:35,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:35,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930894746] [2020-07-20 12:40:35,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:35,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:35,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579703229] [2020-07-20 12:40:35,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:35,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:35,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:35,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:35,380 INFO L87 Difference]: Start difference. First operand 11861 states and 20220 transitions. Second operand 3 states. [2020-07-20 12:40:35,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:35,821 INFO L93 Difference]: Finished difference Result 30541 states and 51968 transitions. [2020-07-20 12:40:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:35,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 382 [2020-07-20 12:40:35,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:35,876 INFO L225 Difference]: With dead ends: 30541 [2020-07-20 12:40:35,876 INFO L226 Difference]: Without dead ends: 20905 [2020-07-20 12:40:35,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 380 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 12:40:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20905 states. [2020-07-20 12:40:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20905 to 20133. [2020-07-20 12:40:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20133 states. [2020-07-20 12:40:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20133 states to 20133 states and 34156 transitions. [2020-07-20 12:40:36,562 INFO L78 Accepts]: Start accepts. Automaton has 20133 states and 34156 transitions. Word has length 382 [2020-07-20 12:40:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:36,563 INFO L479 AbstractCegarLoop]: Abstraction has 20133 states and 34156 transitions. [2020-07-20 12:40:36,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 20133 states and 34156 transitions. [2020-07-20 12:40:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-20 12:40:36,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:36,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:36,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:36,828 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1559974791, now seen corresponding path program 1 times [2020-07-20 12:40:36,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:36,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930446718] [2020-07-20 12:40:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:37,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 3107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:40:37,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:37,593 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 12:40:37,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:37,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930446718] [2020-07-20 12:40:37,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:37,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:37,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884040927] [2020-07-20 12:40:37,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:37,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:37,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:37,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:37,596 INFO L87 Difference]: Start difference. First operand 20133 states and 34156 transitions. Second operand 3 states. [2020-07-20 12:40:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:38,547 INFO L93 Difference]: Finished difference Result 51645 states and 87552 transitions. [2020-07-20 12:40:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:38,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 402 [2020-07-20 12:40:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:38,619 INFO L225 Difference]: With dead ends: 51645 [2020-07-20 12:40:38,619 INFO L226 Difference]: Without dead ends: 35145 [2020-07-20 12:40:38,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 400 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 12:40:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35145 states. [2020-07-20 12:40:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35145 to 33605. [2020-07-20 12:40:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-20 12:40:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56716 transitions. [2020-07-20 12:40:39,746 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56716 transitions. Word has length 402 [2020-07-20 12:40:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:39,746 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56716 transitions. [2020-07-20 12:40:39,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:39,746 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56716 transitions. [2020-07-20 12:40:39,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-20 12:40:39,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:39,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:40,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:40,031 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:40,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:40,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1323511675, now seen corresponding path program 1 times [2020-07-20 12:40:40,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:40,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607520470] [2020-07-20 12:40:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:40,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 3151 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:40:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:40,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:40,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607520470] [2020-07-20 12:40:40,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:40,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:40,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302545610] [2020-07-20 12:40:40,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:40,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:40,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:40,803 INFO L87 Difference]: Start difference. First operand 33605 states and 56716 transitions. Second operand 3 states. [2020-07-20 12:40:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:41,963 INFO L93 Difference]: Finished difference Result 60061 states and 101328 transitions. [2020-07-20 12:40:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:41,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 422 [2020-07-20 12:40:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:42,046 INFO L225 Difference]: With dead ends: 60061 [2020-07-20 12:40:42,047 INFO L226 Difference]: Without dead ends: 33609 [2020-07-20 12:40:42,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 420 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 12:40:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33609 states. [2020-07-20 12:40:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33609 to 33605. [2020-07-20 12:40:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-20 12:40:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56588 transitions. [2020-07-20 12:40:42,810 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56588 transitions. Word has length 422 [2020-07-20 12:40:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:42,811 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56588 transitions. [2020-07-20 12:40:42,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56588 transitions. [2020-07-20 12:40:42,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-20 12:40:42,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:42,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:43,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:43,061 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:43,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:43,062 INFO L82 PathProgramCache]: Analyzing trace with hash -541647871, now seen corresponding path program 1 times [2020-07-20 12:40:43,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:43,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826124201] [2020-07-20 12:40:43,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:43,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 3151 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:40:43,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:44,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:44,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826124201] [2020-07-20 12:40:44,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:44,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:40:44,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241998169] [2020-07-20 12:40:44,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:40:44,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:44,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:40:44,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:40:44,180 INFO L87 Difference]: Start difference. First operand 33605 states and 56588 transitions. Second operand 4 states. [2020-07-20 12:40:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:45,088 INFO L93 Difference]: Finished difference Result 66659 states and 112140 transitions. [2020-07-20 12:40:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:40:45,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 422 [2020-07-20 12:40:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:45,162 INFO L225 Difference]: With dead ends: 66659 [2020-07-20 12:40:45,162 INFO L226 Difference]: Without dead ends: 33605 [2020-07-20 12:40:45,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 419 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 12:40:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-20 12:40:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-20 12:40:47,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-20 12:40:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56523 transitions. [2020-07-20 12:40:47,528 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56523 transitions. Word has length 422 [2020-07-20 12:40:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:47,528 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56523 transitions. [2020-07-20 12:40:47,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:40:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56523 transitions. [2020-07-20 12:40:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 12:40:47,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:47,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:47,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:47,793 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1853231644, now seen corresponding path program 1 times [2020-07-20 12:40:47,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:47,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728782478] [2020-07-20 12:40:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:48,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 3239 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:48,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:48,708 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 12:40:48,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:48,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728782478] [2020-07-20 12:40:48,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:48,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:48,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537790095] [2020-07-20 12:40:48,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:48,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:48,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:48,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:48,711 INFO L87 Difference]: Start difference. First operand 33605 states and 56523 transitions. Second operand 3 states. [2020-07-20 12:40:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:49,163 INFO L93 Difference]: Finished difference Result 51931 states and 87335 transitions. [2020-07-20 12:40:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:49,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-20 12:40:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:49,205 INFO L225 Difference]: With dead ends: 51931 [2020-07-20 12:40:49,205 INFO L226 Difference]: Without dead ends: 33605 [2020-07-20 12:40:49,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-20 12:40:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-20 12:40:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-20 12:40:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56521 transitions. [2020-07-20 12:40:50,118 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56521 transitions. Word has length 486 [2020-07-20 12:40:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:50,119 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56521 transitions. [2020-07-20 12:40:50,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56521 transitions. [2020-07-20 12:40:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 12:40:50,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:50,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:50,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:50,349 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:50,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:50,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2105395092, now seen corresponding path program 1 times [2020-07-20 12:40:50,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:50,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316984561] [2020-07-20 12:40:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:50,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 3239 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:50,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:51,121 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 12:40:51,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:51,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316984561] [2020-07-20 12:40:51,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:51,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:51,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670777091] [2020-07-20 12:40:51,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:51,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:51,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:51,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:51,124 INFO L87 Difference]: Start difference. First operand 33605 states and 56521 transitions. Second operand 3 states. [2020-07-20 12:40:51,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:51,555 INFO L93 Difference]: Finished difference Result 51853 states and 87199 transitions. [2020-07-20 12:40:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:51,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-20 12:40:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:51,593 INFO L225 Difference]: With dead ends: 51853 [2020-07-20 12:40:51,594 INFO L226 Difference]: Without dead ends: 33605 [2020-07-20 12:40:51,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-20 12:40:52,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-20 12:40:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-20 12:40:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56517 transitions. [2020-07-20 12:40:52,525 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56517 transitions. Word has length 486 [2020-07-20 12:40:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:52,526 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56517 transitions. [2020-07-20 12:40:52,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56517 transitions. [2020-07-20 12:40:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 12:40:52,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:52,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:52,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:52,757 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:52,758 INFO L82 PathProgramCache]: Analyzing trace with hash -624922292, now seen corresponding path program 1 times [2020-07-20 12:40:52,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:52,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291140591] [2020-07-20 12:40:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:53,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 3239 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:53,541 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 12:40:53,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:53,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291140591] [2020-07-20 12:40:53,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:53,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:53,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858812548] [2020-07-20 12:40:53,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:53,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:53,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:53,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:53,543 INFO L87 Difference]: Start difference. First operand 33605 states and 56517 transitions. Second operand 3 states. [2020-07-20 12:40:53,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:53,975 INFO L93 Difference]: Finished difference Result 51385 states and 86391 transitions. [2020-07-20 12:40:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:53,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-20 12:40:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:54,014 INFO L225 Difference]: With dead ends: 51385 [2020-07-20 12:40:54,014 INFO L226 Difference]: Without dead ends: 33605 [2020-07-20 12:40:54,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-20 12:40:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-20 12:40:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-20 12:40:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56501 transitions. [2020-07-20 12:40:54,604 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56501 transitions. Word has length 486 [2020-07-20 12:40:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:54,605 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56501 transitions. [2020-07-20 12:40:54,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56501 transitions. [2020-07-20 12:40:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 12:40:54,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:54,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:54,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:54,839 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:54,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:54,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1601272388, now seen corresponding path program 1 times [2020-07-20 12:40:54,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:54,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469775491] [2020-07-20 12:40:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:40:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:56,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 3239 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:40:56,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:56,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:56,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469775491] [2020-07-20 12:40:56,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:56,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 12:40:56,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820457078] [2020-07-20 12:40:56,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 12:40:56,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:56,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 12:40:56,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:40:56,870 INFO L87 Difference]: Start difference. First operand 33605 states and 56501 transitions. Second operand 7 states. [2020-07-20 12:41:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:41:01,332 INFO L93 Difference]: Finished difference Result 220708 states and 370599 transitions. [2020-07-20 12:41:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 12:41:01,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 486 [2020-07-20 12:41:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:41:01,536 INFO L225 Difference]: With dead ends: 220708 [2020-07-20 12:41:01,536 INFO L226 Difference]: Without dead ends: 189248 [2020-07-20 12:41:01,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:41:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189248 states. [2020-07-20 12:41:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189248 to 66439. [2020-07-20 12:41:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66439 states. [2020-07-20 12:41:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66439 states to 66439 states and 111086 transitions. [2020-07-20 12:41:04,277 INFO L78 Accepts]: Start accepts. Automaton has 66439 states and 111086 transitions. Word has length 486 [2020-07-20 12:41:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:41:04,278 INFO L479 AbstractCegarLoop]: Abstraction has 66439 states and 111086 transitions. [2020-07-20 12:41:04,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 12:41:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 66439 states and 111086 transitions. [2020-07-20 12:41:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 12:41:04,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:41:04,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:41:04,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:04,532 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:41:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:41:04,533 INFO L82 PathProgramCache]: Analyzing trace with hash 434909845, now seen corresponding path program 1 times [2020-07-20 12:41:04,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:41:04,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372493334] [2020-07-20 12:41:04,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:41:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:41:05,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 3244 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:41:05,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:41:06,847 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 12:41:06,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:41:06,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372493334] [2020-07-20 12:41:06,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:41:06,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 12:41:06,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676252530] [2020-07-20 12:41:06,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 12:41:06,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:41:06,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 12:41:06,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:41:06,850 INFO L87 Difference]: Start difference. First operand 66439 states and 111086 transitions. Second operand 7 states. [2020-07-20 12:41:12,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:41:12,842 INFO L93 Difference]: Finished difference Result 220516 states and 369703 transitions. [2020-07-20 12:41:12,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 12:41:12,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-20 12:41:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:41:13,056 INFO L225 Difference]: With dead ends: 220516 [2020-07-20 12:41:13,056 INFO L226 Difference]: Without dead ends: 189248 [2020-07-20 12:41:13,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:41:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189248 states. [2020-07-20 12:41:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189248 to 98304. [2020-07-20 12:41:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98304 states. [2020-07-20 12:41:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98304 states to 98304 states and 164325 transitions. [2020-07-20 12:41:19,422 INFO L78 Accepts]: Start accepts. Automaton has 98304 states and 164325 transitions. Word has length 487 [2020-07-20 12:41:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:41:19,423 INFO L479 AbstractCegarLoop]: Abstraction has 98304 states and 164325 transitions. [2020-07-20 12:41:19,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 12:41:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 98304 states and 164325 transitions. [2020-07-20 12:41:19,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 12:41:19,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:41:19,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:41:19,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:19,705 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:41:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:41:19,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1664588137, now seen corresponding path program 1 times [2020-07-20 12:41:19,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:41:19,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056199224] [2020-07-20 12:41:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:41:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:41:20,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 3244 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:41:20,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:41:20,587 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 12:41:20,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:41:20,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056199224] [2020-07-20 12:41:20,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:41:20,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 12:41:20,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461585444] [2020-07-20 12:41:20,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 12:41:20,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:41:20,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 12:41:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:41:20,591 INFO L87 Difference]: Start difference. First operand 98304 states and 164325 transitions. Second operand 7 states. [2020-07-20 12:41:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:41:28,197 INFO L93 Difference]: Finished difference Result 251373 states and 421278 transitions. [2020-07-20 12:41:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 12:41:28,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-20 12:41:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:41:28,448 INFO L225 Difference]: With dead ends: 251373 [2020-07-20 12:41:28,448 INFO L226 Difference]: Without dead ends: 221113 [2020-07-20 12:41:28,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:41:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221113 states. [2020-07-20 12:41:35,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221113 to 129069. [2020-07-20 12:41:35,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129069 states. [2020-07-20 12:41:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129069 states to 129069 states and 215745 transitions. [2020-07-20 12:41:36,111 INFO L78 Accepts]: Start accepts. Automaton has 129069 states and 215745 transitions. Word has length 487 [2020-07-20 12:41:36,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:41:36,112 INFO L479 AbstractCegarLoop]: Abstraction has 129069 states and 215745 transitions. [2020-07-20 12:41:36,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 12:41:36,112 INFO L276 IsEmpty]: Start isEmpty. Operand 129069 states and 215745 transitions. [2020-07-20 12:41:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 12:41:36,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:41:36,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:41:36,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:36,434 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:41:36,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:41:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1064136043, now seen corresponding path program 1 times [2020-07-20 12:41:36,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:41:36,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331277803] [2020-07-20 12:41:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:41:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:41:37,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 3244 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:41:37,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:41:37,324 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 12:41:37,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:41:37,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331277803] [2020-07-20 12:41:37,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:41:37,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 12:41:37,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922407748] [2020-07-20 12:41:37,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 12:41:37,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:41:37,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 12:41:37,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:41:37,326 INFO L87 Difference]: Start difference. First operand 129069 states and 215745 transitions. Second operand 7 states. [2020-07-20 12:41:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:41:49,078 INFO L93 Difference]: Finished difference Result 279937 states and 468892 transitions. [2020-07-20 12:41:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 12:41:49,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-20 12:41:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:41:49,381 INFO L225 Difference]: With dead ends: 279937 [2020-07-20 12:41:49,381 INFO L226 Difference]: Without dead ends: 250445 [2020-07-20 12:41:49,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:41:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250445 states. [2020-07-20 12:41:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250445 to 159049. [2020-07-20 12:41:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159049 states. [2020-07-20 12:41:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159049 states to 159049 states and 265807 transitions. [2020-07-20 12:41:56,248 INFO L78 Accepts]: Start accepts. Automaton has 159049 states and 265807 transitions. Word has length 487 [2020-07-20 12:41:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:41:56,248 INFO L479 AbstractCegarLoop]: Abstraction has 159049 states and 265807 transitions. [2020-07-20 12:41:56,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 12:41:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand 159049 states and 265807 transitions. [2020-07-20 12:41:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 12:41:56,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:41:56,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:41:56,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:56,592 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:41:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:41:56,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2070221461, now seen corresponding path program 1 times [2020-07-20 12:41:56,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:41:56,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833032367] [2020-07-20 12:41:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:41:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:41:57,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 3244 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:41:57,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:41:57,648 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 12:41:57,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:41:57,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833032367] [2020-07-20 12:41:57,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:41:57,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 12:41:57,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494675087] [2020-07-20 12:41:57,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 12:41:57,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:41:57,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 12:41:57,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:41:57,652 INFO L87 Difference]: Start difference. First operand 159049 states and 265807 transitions. Second operand 7 states. [2020-07-20 12:42:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:42:11,368 INFO L93 Difference]: Finished difference Result 310397 states and 519760 transitions. [2020-07-20 12:42:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 12:42:11,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-20 12:42:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:42:11,710 INFO L225 Difference]: With dead ends: 310397 [2020-07-20 12:42:11,710 INFO L226 Difference]: Without dead ends: 280905 [2020-07-20 12:42:12,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:42:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280905 states. [2020-07-20 12:42:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280905 to 190091. [2020-07-20 12:42:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190091 states. [2020-07-20 12:42:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190091 states to 190091 states and 317644 transitions. [2020-07-20 12:42:21,250 INFO L78 Accepts]: Start accepts. Automaton has 190091 states and 317644 transitions. Word has length 487 [2020-07-20 12:42:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:42:21,250 INFO L479 AbstractCegarLoop]: Abstraction has 190091 states and 317644 transitions. [2020-07-20 12:42:21,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 12:42:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 190091 states and 317644 transitions. [2020-07-20 12:42:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 12:42:21,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:42:21,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:42:21,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:42:21,620 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:42:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:42:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash 61917545, now seen corresponding path program 1 times [2020-07-20 12:42:21,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:42:21,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468118859] [2020-07-20 12:42:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:42:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:42:22,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 3244 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:42:22,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:42:23,091 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 12:42:23,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:42:23,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468118859] [2020-07-20 12:42:23,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:42:23,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 12:42:23,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048670509] [2020-07-20 12:42:23,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 12:42:23,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:42:23,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 12:42:23,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:42:23,093 INFO L87 Difference]: Start difference. First operand 190091 states and 317644 transitions. Second operand 7 states. [2020-07-20 12:42:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:42:38,822 INFO L93 Difference]: Finished difference Result 341529 states and 571732 transitions. [2020-07-20 12:42:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 12:42:38,822 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-20 12:42:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:42:39,167 INFO L225 Difference]: With dead ends: 341529 [2020-07-20 12:42:39,168 INFO L226 Difference]: Without dead ends: 312037 [2020-07-20 12:42:39,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:42:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312037 states. [2020-07-20 12:42:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312037 to 221508. [2020-07-20 12:42:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221508 states. [2020-07-20 12:42:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221508 states to 221508 states and 370099 transitions. [2020-07-20 12:42:54,574 INFO L78 Accepts]: Start accepts. Automaton has 221508 states and 370099 transitions. Word has length 487 [2020-07-20 12:42:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:42:54,574 INFO L479 AbstractCegarLoop]: Abstraction has 221508 states and 370099 transitions. [2020-07-20 12:42:54,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 12:42:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 221508 states and 370099 transitions. [2020-07-20 12:42:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 12:42:54,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:42:54,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:42:54,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:42:54,979 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:42:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:42:54,980 INFO L82 PathProgramCache]: Analyzing trace with hash 361727920, now seen corresponding path program 1 times [2020-07-20 12:42:54,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:42:54,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939763078] [2020-07-20 12:42:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:42:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:42:55,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 3249 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:42:55,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:42:55,762 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 12:42:55,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:42:55,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939763078] [2020-07-20 12:42:55,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:42:55,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:42:55,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645710504] [2020-07-20 12:42:55,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:42:55,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:42:55,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:42:55,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:42:55,764 INFO L87 Difference]: Start difference. First operand 221508 states and 370099 transitions. Second operand 3 states. [2020-07-20 12:43:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:43:02,267 INFO L93 Difference]: Finished difference Result 341741 states and 570937 transitions. [2020-07-20 12:43:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:43:02,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-20 12:43:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:43:02,415 INFO L225 Difference]: With dead ends: 341741 [2020-07-20 12:43:02,415 INFO L226 Difference]: Without dead ends: 123436 [2020-07-20 12:43:02,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 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 12:43:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123436 states. [2020-07-20 12:43:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123436 to 123434. [2020-07-20 12:43:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123434 states. [2020-07-20 12:43:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123434 states to 123434 states and 205799 transitions. [2020-07-20 12:43:11,467 INFO L78 Accepts]: Start accepts. Automaton has 123434 states and 205799 transitions. Word has length 488 [2020-07-20 12:43:11,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:43:11,467 INFO L479 AbstractCegarLoop]: Abstraction has 123434 states and 205799 transitions. [2020-07-20 12:43:11,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:43:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 123434 states and 205799 transitions. [2020-07-20 12:43:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 12:43:11,554 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:43:11,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:43:11,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:11,756 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:43:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:43:11,756 INFO L82 PathProgramCache]: Analyzing trace with hash 248393120, now seen corresponding path program 1 times [2020-07-20 12:43:11,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:43:11,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110263599] [2020-07-20 12:43:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:43:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:43:12,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 3249 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:43:12,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:43:12,536 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 12:43:12,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:43:12,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110263599] [2020-07-20 12:43:12,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:43:12,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:43:12,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416202019] [2020-07-20 12:43:12,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:43:12,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:43:12,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:43:12,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:43:12,539 INFO L87 Difference]: Start difference. First operand 123434 states and 205799 transitions. Second operand 3 states. [2020-07-20 12:43:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:43:17,920 INFO L93 Difference]: Finished difference Result 246170 states and 410361 transitions. [2020-07-20 12:43:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:43:17,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-20 12:43:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:43:18,061 INFO L225 Difference]: With dead ends: 246170 [2020-07-20 12:43:18,061 INFO L226 Difference]: Without dead ends: 123316 [2020-07-20 12:43:18,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 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 12:43:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123316 states. [2020-07-20 12:43:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123316 to 123316. [2020-07-20 12:43:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123316 states. [2020-07-20 12:43:28,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123316 states to 123316 states and 205342 transitions. [2020-07-20 12:43:28,160 INFO L78 Accepts]: Start accepts. Automaton has 123316 states and 205342 transitions. Word has length 488 [2020-07-20 12:43:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:43:28,160 INFO L479 AbstractCegarLoop]: Abstraction has 123316 states and 205342 transitions. [2020-07-20 12:43:28,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:43:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 123316 states and 205342 transitions. [2020-07-20 12:43:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 12:43:28,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:43:28,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:43:28,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:28,451 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:43:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:43:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1495583451, now seen corresponding path program 1 times [2020-07-20 12:43:28,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:43:28,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343358428] [2020-07-20 12:43:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:43:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:43:29,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 3257 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:43:29,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:43:29,231 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 12:43:29,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:43:29,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343358428] [2020-07-20 12:43:29,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:43:29,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:43:29,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807403398] [2020-07-20 12:43:29,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:43:29,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:43:29,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:43:29,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:43:29,233 INFO L87 Difference]: Start difference. First operand 123316 states and 205342 transitions. Second operand 3 states. [2020-07-20 12:43:31,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:43:31,870 INFO L93 Difference]: Finished difference Result 123322 states and 205345 transitions. [2020-07-20 12:43:31,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:43:31,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-20 12:43:31,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:43:31,953 INFO L225 Difference]: With dead ends: 123322 [2020-07-20 12:43:31,953 INFO L226 Difference]: Without dead ends: 61235 [2020-07-20 12:43:32,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:43:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61235 states. [2020-07-20 12:43:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61235 to 61233. [2020-07-20 12:43:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61233 states. [2020-07-20 12:43:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61233 states to 61233 states and 102035 transitions. [2020-07-20 12:43:35,161 INFO L78 Accepts]: Start accepts. Automaton has 61233 states and 102035 transitions. Word has length 492 [2020-07-20 12:43:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:43:35,162 INFO L479 AbstractCegarLoop]: Abstraction has 61233 states and 102035 transitions. [2020-07-20 12:43:35,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:43:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 61233 states and 102035 transitions. [2020-07-20 12:43:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 12:43:35,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:43:35,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:43:35,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:35,421 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:43:35,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:43:35,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1667862974, now seen corresponding path program 1 times [2020-07-20 12:43:35,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:43:35,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710745343] [2020-07-20 12:43:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:43:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:43:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 3265 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:43:36,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:43:36,164 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 12:43:36,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:43:36,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710745343] [2020-07-20 12:43:36,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:43:36,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:43:36,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168860884] [2020-07-20 12:43:36,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:43:36,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:43:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:43:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:43:36,166 INFO L87 Difference]: Start difference. First operand 61233 states and 102035 transitions. Second operand 3 states. [2020-07-20 12:43:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:43:37,730 INFO L93 Difference]: Finished difference Result 61239 states and 102038 transitions. [2020-07-20 12:43:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:43:37,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-20 12:43:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:43:37,763 INFO L225 Difference]: With dead ends: 61239 [2020-07-20 12:43:37,763 INFO L226 Difference]: Without dead ends: 30537 [2020-07-20 12:43:37,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:43:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30537 states. [2020-07-20 12:43:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30537 to 30535. [2020-07-20 12:43:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30535 states. [2020-07-20 12:43:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30535 states to 30535 states and 50928 transitions. [2020-07-20 12:43:39,034 INFO L78 Accepts]: Start accepts. Automaton has 30535 states and 50928 transitions. Word has length 496 [2020-07-20 12:43:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:43:39,035 INFO L479 AbstractCegarLoop]: Abstraction has 30535 states and 50928 transitions. [2020-07-20 12:43:39,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:43:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 30535 states and 50928 transitions. [2020-07-20 12:43:39,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 12:43:39,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:43:39,061 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:43:39,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:39,262 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:43:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:43:39,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1349161951, now seen corresponding path program 1 times [2020-07-20 12:43:39,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:43:39,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917242754] [2020-07-20 12:43:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:43:39,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 3273 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:43:39,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:43:40,037 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 12:43:40,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:43:40,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917242754] [2020-07-20 12:43:40,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:43:40,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:43:40,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41113315] [2020-07-20 12:43:40,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:43:40,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:43:40,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:43:40,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:43:40,039 INFO L87 Difference]: Start difference. First operand 30535 states and 50928 transitions. Second operand 3 states. [2020-07-20 12:43:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:43:41,038 INFO L93 Difference]: Finished difference Result 44886 states and 74861 transitions. [2020-07-20 12:43:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:43:41,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-20 12:43:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:43:41,056 INFO L225 Difference]: With dead ends: 44886 [2020-07-20 12:43:41,056 INFO L226 Difference]: Without dead ends: 15384 [2020-07-20 12:43:41,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 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 12:43:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15384 states. [2020-07-20 12:43:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15384 to 15382. [2020-07-20 12:43:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15382 states. [2020-07-20 12:43:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15382 states to 15382 states and 25622 transitions. [2020-07-20 12:43:41,733 INFO L78 Accepts]: Start accepts. Automaton has 15382 states and 25622 transitions. Word has length 500 [2020-07-20 12:43:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:43:41,733 INFO L479 AbstractCegarLoop]: Abstraction has 15382 states and 25622 transitions. [2020-07-20 12:43:41,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:43:41,734 INFO L276 IsEmpty]: Start isEmpty. Operand 15382 states and 25622 transitions. [2020-07-20 12:43:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 12:43:41,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:43:41,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:43:41,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:41,954 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:43:41,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:43:41,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1058528845, now seen corresponding path program 1 times [2020-07-20 12:43:41,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:43:41,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307321556] [2020-07-20 12:43:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:43:42,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 3274 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:43:42,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:43:42,714 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 12:43:42,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:43:42,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307321556] [2020-07-20 12:43:42,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:43:42,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:43:42,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816110780] [2020-07-20 12:43:42,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:43:42,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:43:42,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:43:42,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:43:42,716 INFO L87 Difference]: Start difference. First operand 15382 states and 25622 transitions. Second operand 3 states. [2020-07-20 12:43:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:43:43,616 INFO L93 Difference]: Finished difference Result 30100 states and 50095 transitions. [2020-07-20 12:43:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:43:43,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-20 12:43:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:43:43,632 INFO L225 Difference]: With dead ends: 30100 [2020-07-20 12:43:43,633 INFO L226 Difference]: Without dead ends: 15382 [2020-07-20 12:43:43,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 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 12:43:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15382 states. [2020-07-20 12:43:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15382 to 15382. [2020-07-20 12:43:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15382 states. [2020-07-20 12:43:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15382 states to 15382 states and 25621 transitions. [2020-07-20 12:43:44,265 INFO L78 Accepts]: Start accepts. Automaton has 15382 states and 25621 transitions. Word has length 501 [2020-07-20 12:43:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:43:44,265 INFO L479 AbstractCegarLoop]: Abstraction has 15382 states and 25621 transitions. [2020-07-20 12:43:44,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:43:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 15382 states and 25621 transitions. [2020-07-20 12:43:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 12:43:44,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:43:44,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:43:44,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:44,485 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:43:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:43:44,486 INFO L82 PathProgramCache]: Analyzing trace with hash 26522856, now seen corresponding path program 1 times [2020-07-20 12:43:44,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:43:44,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585108089] [2020-07-20 12:43:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:43:45,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:43:45,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:43:45,303 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 12:43:45,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:43:45,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585108089] [2020-07-20 12:43:45,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:43:45,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:43:45,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244397518] [2020-07-20 12:43:45,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:43:45,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:43:45,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:43:45,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:43:45,305 INFO L87 Difference]: Start difference. First operand 15382 states and 25621 transitions. Second operand 4 states. [2020-07-20 12:43:47,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:43:47,195 INFO L93 Difference]: Finished difference Result 44545 states and 74134 transitions. [2020-07-20 12:43:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:43:47,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-20 12:43:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:43:47,231 INFO L225 Difference]: With dead ends: 44545 [2020-07-20 12:43:47,231 INFO L226 Difference]: Without dead ends: 29908 [2020-07-20 12:43:47,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:43:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29908 states. [2020-07-20 12:43:48,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29908 to 27776. [2020-07-20 12:43:48,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27776 states. [2020-07-20 12:43:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27776 states to 27776 states and 46108 transitions. [2020-07-20 12:43:48,453 INFO L78 Accepts]: Start accepts. Automaton has 27776 states and 46108 transitions. Word has length 505 [2020-07-20 12:43:48,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:43:48,454 INFO L479 AbstractCegarLoop]: Abstraction has 27776 states and 46108 transitions. [2020-07-20 12:43:48,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:43:48,454 INFO L276 IsEmpty]: Start isEmpty. Operand 27776 states and 46108 transitions. [2020-07-20 12:43:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 12:43:48,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:43:48,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:43:48,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:48,677 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:43:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:43:48,678 INFO L82 PathProgramCache]: Analyzing trace with hash -920176291, now seen corresponding path program 1 times [2020-07-20 12:43:48,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:43:48,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714102001] [2020-07-20 12:43:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:43:49,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:43:49,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:43:49,801 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 12:43:49,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:43:49,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714102001] [2020-07-20 12:43:49,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:43:49,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:43:49,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925036937] [2020-07-20 12:43:49,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:43:49,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:43:49,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:43:49,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:43:49,804 INFO L87 Difference]: Start difference. First operand 27776 states and 46108 transitions. Second operand 4 states. [2020-07-20 12:43:52,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:43:52,779 INFO L93 Difference]: Finished difference Result 81573 states and 135355 transitions. [2020-07-20 12:43:52,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:43:52,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 506 [2020-07-20 12:43:52,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:43:52,836 INFO L225 Difference]: With dead ends: 81573 [2020-07-20 12:43:52,836 INFO L226 Difference]: Without dead ends: 54542 [2020-07-20 12:43:52,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:43:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54542 states. [2020-07-20 12:43:55,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54542 to 50330. [2020-07-20 12:43:55,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50330 states. [2020-07-20 12:43:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50330 states to 50330 states and 83280 transitions. [2020-07-20 12:43:55,525 INFO L78 Accepts]: Start accepts. Automaton has 50330 states and 83280 transitions. Word has length 506 [2020-07-20 12:43:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:43:55,525 INFO L479 AbstractCegarLoop]: Abstraction has 50330 states and 83280 transitions. [2020-07-20 12:43:55,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:43:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 50330 states and 83280 transitions. [2020-07-20 12:43:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-20 12:43:55,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:43:55,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:43:55,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:55,766 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:43:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:43:55,766 INFO L82 PathProgramCache]: Analyzing trace with hash 304023201, now seen corresponding path program 1 times [2020-07-20 12:43:55,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:43:55,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887105920] [2020-07-20 12:43:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:43:56,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 3284 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:43:56,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:43:56,556 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 12:43:56,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:43:56,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887105920] [2020-07-20 12:43:56,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:43:56,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:43:56,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295473263] [2020-07-20 12:43:56,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:43:56,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:43:56,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:43:56,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:43:56,559 INFO L87 Difference]: Start difference. First operand 50330 states and 83280 transitions. Second operand 4 states. [2020-07-20 12:44:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:44:01,913 INFO L93 Difference]: Finished difference Result 148871 states and 246289 transitions. [2020-07-20 12:44:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:44:01,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-07-20 12:44:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:44:02,031 INFO L225 Difference]: With dead ends: 148871 [2020-07-20 12:44:02,032 INFO L226 Difference]: Without dead ends: 99286 [2020-07-20 12:44:02,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:44:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99286 states. [2020-07-20 12:44:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99286 to 90972. [2020-07-20 12:44:07,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90972 states. [2020-07-20 12:44:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90972 states to 90972 states and 150061 transitions. [2020-07-20 12:44:07,420 INFO L78 Accepts]: Start accepts. Automaton has 90972 states and 150061 transitions. Word has length 507 [2020-07-20 12:44:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:44:07,420 INFO L479 AbstractCegarLoop]: Abstraction has 90972 states and 150061 transitions. [2020-07-20 12:44:07,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:44:07,421 INFO L276 IsEmpty]: Start isEmpty. Operand 90972 states and 150061 transitions. [2020-07-20 12:44:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-20 12:44:07,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:44:07,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:44:07,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:44:07,685 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:44:07,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:44:07,686 INFO L82 PathProgramCache]: Analyzing trace with hash 106603766, now seen corresponding path program 1 times [2020-07-20 12:44:07,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:44:07,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738401087] [2020-07-20 12:44:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:44:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:44:08,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 3285 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:44:08,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:44:08,492 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 12:44:08,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:44:08,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738401087] [2020-07-20 12:44:08,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:44:08,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:44:08,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814688176] [2020-07-20 12:44:08,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:44:08,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:44:08,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:44:08,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:44:08,494 INFO L87 Difference]: Start difference. First operand 90972 states and 150061 transitions. Second operand 4 states. [2020-07-20 12:44:17,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:44:17,887 INFO L93 Difference]: Finished difference Result 266007 states and 438796 transitions. [2020-07-20 12:44:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:44:17,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 508 [2020-07-20 12:44:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:44:18,100 INFO L225 Difference]: With dead ends: 266007 [2020-07-20 12:44:18,101 INFO L226 Difference]: Without dead ends: 175780 [2020-07-20 12:44:18,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:44:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175780 states. [2020-07-20 12:44:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175780 to 161368. [2020-07-20 12:44:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161368 states. [2020-07-20 12:44:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161368 states to 161368 states and 265391 transitions. [2020-07-20 12:44:32,081 INFO L78 Accepts]: Start accepts. Automaton has 161368 states and 265391 transitions. Word has length 508 [2020-07-20 12:44:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:44:32,082 INFO L479 AbstractCegarLoop]: Abstraction has 161368 states and 265391 transitions. [2020-07-20 12:44:32,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:44:32,082 INFO L276 IsEmpty]: Start isEmpty. Operand 161368 states and 265391 transitions. [2020-07-20 12:44:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-20 12:44:32,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:44:32,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:44:32,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:44:32,408 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:44:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:44:32,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1211329446, now seen corresponding path program 1 times [2020-07-20 12:44:32,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:44:32,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220002910] [2020-07-20 12:44:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:44:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:44:33,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:44:33,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:44:33,211 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 12:44:33,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:44:33,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220002910] [2020-07-20 12:44:33,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:44:33,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:44:33,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454986361] [2020-07-20 12:44:33,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:44:33,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:44:33,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:44:33,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:44:33,213 INFO L87 Difference]: Start difference. First operand 161368 states and 265391 transitions. Second operand 4 states. [2020-07-20 12:44:48,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:44:48,598 INFO L93 Difference]: Finished difference Result 459391 states and 755792 transitions. [2020-07-20 12:44:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:44:48,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 509 [2020-07-20 12:44:48,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:44:48,942 INFO L225 Difference]: With dead ends: 459391 [2020-07-20 12:44:48,943 INFO L226 Difference]: Without dead ends: 302483 [2020-07-20 12:44:49,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:44:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302483 states. [2020-07-20 12:45:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302483 to 279841. [2020-07-20 12:45:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279841 states. [2020-07-20 12:45:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279841 states to 279841 states and 458998 transitions. [2020-07-20 12:45:09,696 INFO L78 Accepts]: Start accepts. Automaton has 279841 states and 458998 transitions. Word has length 509 [2020-07-20 12:45:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:45:09,696 INFO L479 AbstractCegarLoop]: Abstraction has 279841 states and 458998 transitions. [2020-07-20 12:45:09,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:45:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 279841 states and 458998 transitions. [2020-07-20 12:45:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-20 12:45:09,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:45:09,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:45:10,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:45:10,136 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:45:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:45:10,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1884302537, now seen corresponding path program 1 times [2020-07-20 12:45:10,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:45:10,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997810355] [2020-07-20 12:45:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:45:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:45:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:45:10,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:45:10,932 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 12:45:10,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:45:10,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997810355] [2020-07-20 12:45:10,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:45:10,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:45:10,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234072900] [2020-07-20 12:45:10,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:45:10,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:45:10,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:45:10,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:45:10,935 INFO L87 Difference]: Start difference. First operand 279841 states and 458998 transitions. Second operand 4 states. [2020-07-20 12:45:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:45:33,142 INFO L93 Difference]: Finished difference Result 396288 states and 650961 transitions. [2020-07-20 12:45:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:45:33,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 509 [2020-07-20 12:45:33,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:45:33,547 INFO L225 Difference]: With dead ends: 396288 [2020-07-20 12:45:33,547 INFO L226 Difference]: Without dead ends: 334275 [2020-07-20 12:45:33,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:45:33,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334275 states. [2020-07-20 12:45:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334275 to 312105. [2020-07-20 12:45:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312105 states. [2020-07-20 12:45:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312105 states to 312105 states and 511825 transitions. [2020-07-20 12:45:56,249 INFO L78 Accepts]: Start accepts. Automaton has 312105 states and 511825 transitions. Word has length 509 [2020-07-20 12:45:56,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:45:56,249 INFO L479 AbstractCegarLoop]: Abstraction has 312105 states and 511825 transitions. [2020-07-20 12:45:56,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:45:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand 312105 states and 511825 transitions. [2020-07-20 12:45:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-20 12:45:56,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:45:56,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:45:56,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:45:56,695 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:45:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:45:56,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1849533820, now seen corresponding path program 1 times [2020-07-20 12:45:56,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:45:56,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903177848] [2020-07-20 12:45:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:45:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:45:57,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:45:57,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:45:57,481 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 12:45:57,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:45:57,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903177848] [2020-07-20 12:45:57,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:45:57,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:45:57,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934368686] [2020-07-20 12:45:57,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:45:57,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:45:57,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:45:57,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:45:57,483 INFO L87 Difference]: Start difference. First operand 312105 states and 511825 transitions. Second operand 3 states. [2020-07-20 12:46:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:46:23,812 INFO L93 Difference]: Finished difference Result 663822 states and 1089232 transitions. [2020-07-20 12:46:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:46:23,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 510 [2020-07-20 12:46:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:46:24,492 INFO L225 Difference]: With dead ends: 663822 [2020-07-20 12:46:24,492 INFO L226 Difference]: Without dead ends: 513081 [2020-07-20 12:46:24,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 508 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 12:46:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513081 states. [2020-07-20 12:47:07,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513081 to 512665. [2020-07-20 12:47:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512665 states. [2020-07-20 12:47:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512665 states to 512665 states and 840079 transitions. [2020-07-20 12:47:08,603 INFO L78 Accepts]: Start accepts. Automaton has 512665 states and 840079 transitions. Word has length 510 [2020-07-20 12:47:08,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:47:08,603 INFO L479 AbstractCegarLoop]: Abstraction has 512665 states and 840079 transitions. [2020-07-20 12:47:08,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:47:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 512665 states and 840079 transitions. [2020-07-20 12:47:09,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-20 12:47:09,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:47:09,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:47:09,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:47:09,293 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:47:09,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:47:09,294 INFO L82 PathProgramCache]: Analyzing trace with hash -728229181, now seen corresponding path program 1 times [2020-07-20 12:47:09,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:47:09,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698800827] [2020-07-20 12:47:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:47:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:47:09,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 3298 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:47:09,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:47:10,346 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 12:47:10,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:47:10,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698800827] [2020-07-20 12:47:10,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:47:10,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 12:47:10,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106124593] [2020-07-20 12:47:10,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 12:47:10,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:47:10,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 12:47:10,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:47:10,349 INFO L87 Difference]: Start difference. First operand 512665 states and 840079 transitions. Second operand 7 states. [2020-07-20 12:48:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:48:10,206 INFO L93 Difference]: Finished difference Result 1267997 states and 2075998 transitions. [2020-07-20 12:48:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 12:48:10,206 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 511 [2020-07-20 12:48:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:48:11,314 INFO L225 Difference]: With dead ends: 1267997 [2020-07-20 12:48:11,314 INFO L226 Difference]: Without dead ends: 756864 [2020-07-20 12:48:11,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-07-20 12:48:12,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756864 states. [2020-07-20 12:48:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756864 to 512665. [2020-07-20 12:48:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512665 states. [2020-07-20 12:49:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512665 states to 512665 states and 830993 transitions. [2020-07-20 12:49:01,071 INFO L78 Accepts]: Start accepts. Automaton has 512665 states and 830993 transitions. Word has length 511 [2020-07-20 12:49:01,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:49:01,072 INFO L479 AbstractCegarLoop]: Abstraction has 512665 states and 830993 transitions. [2020-07-20 12:49:01,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 12:49:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 512665 states and 830993 transitions. [2020-07-20 12:49:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-20 12:49:01,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:49:01,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:49:01,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:49:01,730 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:49:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:49:01,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2103082301, now seen corresponding path program 1 times [2020-07-20 12:49:01,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:49:01,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383406720] [2020-07-20 12:49:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:49:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:49:02,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 3298 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:49:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:49:02,647 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 12:49:02,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:49:02,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383406720] [2020-07-20 12:49:02,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:49:02,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 12:49:02,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516230597] [2020-07-20 12:49:02,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 12:49:02,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:49:02,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 12:49:02,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:49:02,649 INFO L87 Difference]: Start difference. First operand 512665 states and 830993 transitions. Second operand 7 states. [2020-07-20 12:50:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:50:01,747 INFO L93 Difference]: Finished difference Result 961391 states and 1553187 transitions. [2020-07-20 12:50:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 12:50:01,748 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 511 [2020-07-20 12:50:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:50:02,643 INFO L225 Difference]: With dead ends: 961391 [2020-07-20 12:50:02,644 INFO L226 Difference]: Without dead ends: 748220 [2020-07-20 12:50:02,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-07-20 12:50:03,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748220 states. [2020-07-20 12:50:49,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748220 to 512665. [2020-07-20 12:50:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512665 states. [2020-07-20 12:50:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512665 states to 512665 states and 830991 transitions. [2020-07-20 12:50:50,765 INFO L78 Accepts]: Start accepts. Automaton has 512665 states and 830991 transitions. Word has length 511 [2020-07-20 12:50:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:50:50,765 INFO L479 AbstractCegarLoop]: Abstraction has 512665 states and 830991 transitions. [2020-07-20 12:50:50,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 12:50:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 512665 states and 830991 transitions. [2020-07-20 12:50:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-20 12:50:51,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:50:51,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:50:51,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:50:51,405 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:50:51,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:50:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1228696802, now seen corresponding path program 1 times [2020-07-20 12:50:51,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:50:51,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676785501] [2020-07-20 12:50:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:50:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:50:52,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:50:52,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:50:53,113 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 12:50:53,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:50:53,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676785501] [2020-07-20 12:50:53,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:50:53,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:50:53,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822739969] [2020-07-20 12:50:53,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:50:53,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:50:53,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:50:53,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:50:53,115 INFO L87 Difference]: Start difference. First operand 512665 states and 830991 transitions. Second operand 3 states. [2020-07-20 12:51:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:51:14,513 INFO L93 Difference]: Finished difference Result 512671 states and 830994 transitions. [2020-07-20 12:51:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:51:14,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 511 [2020-07-20 12:51:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:51:14,813 INFO L225 Difference]: With dead ends: 512671 [2020-07-20 12:51:14,813 INFO L226 Difference]: Without dead ends: 250380 [2020-07-20 12:51:14,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 509 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 12:51:15,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250380 states. [2020-07-20 12:51:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250380 to 250378. [2020-07-20 12:51:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250378 states. [2020-07-20 12:51:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250378 states to 250378 states and 406327 transitions. [2020-07-20 12:51:31,591 INFO L78 Accepts]: Start accepts. Automaton has 250378 states and 406327 transitions. Word has length 511 [2020-07-20 12:51:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:51:31,591 INFO L479 AbstractCegarLoop]: Abstraction has 250378 states and 406327 transitions. [2020-07-20 12:51:31,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:51:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 250378 states and 406327 transitions. [2020-07-20 12:51:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2020-07-20 12:51:31,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:51:31,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:51:31,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:51:31,980 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:51:31,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:51:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash 130218293, now seen corresponding path program 1 times [2020-07-20 12:51:31,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:51:31,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617536478] [2020-07-20 12:51:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:51:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:51:32,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 12:51:32,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:51:32,906 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 12:51:32,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:51:32,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617536478] [2020-07-20 12:51:32,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:51:32,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 12:51:32,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956709600] [2020-07-20 12:51:32,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 12:51:32,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:51:32,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 12:51:32,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:51:32,908 INFO L87 Difference]: Start difference. First operand 250378 states and 406327 transitions. Second operand 7 states.