/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 [2020-07-21 12:29:14,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:29:14,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:29:14,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:29:14,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:29:14,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:29:14,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:29:14,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:29:14,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:29:14,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:29:14,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:29:14,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:29:14,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:29:14,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:29:14,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:29:14,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:29:14,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:29:14,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:29:14,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:29:14,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:29:14,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:29:14,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:29:14,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:29:14,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:29:14,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:29:14,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:29:14,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:29:14,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:29:14,911 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:29:14,939 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:29:14,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:29:14,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:29:14,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:29:14,940 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:29:14,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:29:14,941 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:29:14,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:29:14,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:29:14,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:29:14,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:29:14,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:29:14,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:29:14,944 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:29:14,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:29:14,944 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:29:14,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:29:14,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:29:14,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:29:14,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:29:14,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:29:14,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:29:14,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:29:14,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:29:14,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:29:14,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:29:14,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:14,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:29:14,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:29:14,948 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 [2020-07-21 12:29:15,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:29:15,230 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:29:15,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:29:15,237 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:29:15,237 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:29:15,238 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 12:29:15,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f940be6f0/bbb058a8633844d6a8148ad220d67514/FLAG239a1ef5b [2020-07-21 12:29:16,034 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:29:16,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 12:29:16,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f940be6f0/bbb058a8633844d6a8148ad220d67514/FLAG239a1ef5b [2020-07-21 12:29:16,200 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f940be6f0/bbb058a8633844d6a8148ad220d67514 [2020-07-21 12:29:16,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:29:16,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:29:16,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:29:16,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:29:16,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:29:16,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:29:16" (1/1) ... [2020-07-21 12:29:16,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@564a53f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:16, skipping insertion in model container [2020-07-21 12:29:16,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:29:16" (1/1) ... [2020-07-21 12:29:16,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:29:16,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:29:18,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:29:18,833 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:29:20,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:29:20,532 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:29:20,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:20 WrapperNode [2020-07-21 12:29:20,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:29:20,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:29:20,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:29:20,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:29:20,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:20" (1/1) ... [2020-07-21 12:29:20,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:20" (1/1) ... [2020-07-21 12:29:20,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:20" (1/1) ... [2020-07-21 12:29:20,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:20" (1/1) ... [2020-07-21 12:29:20,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:20" (1/1) ... [2020-07-21 12:29:20,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:20" (1/1) ... [2020-07-21 12:29:20,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:20" (1/1) ... [2020-07-21 12:29:20,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:29:20,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:29:20,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:29:20,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:29:20,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:29:20,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:29:20,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:29:20,952 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:29:20,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:29:20,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:29:20,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:29:20,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:29:20,953 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:29:20,953 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:29:20,953 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:29:20,954 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:29:20,954 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:29:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:29:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:29:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:29:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:29:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 12:29:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:29:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:29:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:29:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:29:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:29:26,670 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:29:26,670 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:29:26,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:29:26 BoogieIcfgContainer [2020-07-21 12:29:26,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:29:26,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:29:26,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:29:26,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:29:26,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:29:16" (1/3) ... [2020-07-21 12:29:26,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28734e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:29:26, skipping insertion in model container [2020-07-21 12:29:26,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:29:20" (2/3) ... [2020-07-21 12:29:26,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28734e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:29:26, skipping insertion in model container [2020-07-21 12:29:26,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:29:26" (3/3) ... [2020-07-21 12:29:26,696 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 12:29:26,705 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:29:26,715 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 12:29:26,728 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 12:29:26,761 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:29:26,761 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:29:26,762 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:29:26,762 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:29:26,762 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:29:26,762 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:29:26,762 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:29:26,762 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:29:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-07-21 12:29:26,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 12:29:26,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:26,862 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] [2020-07-21 12:29:26,863 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-07-21 12:29:26,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:26,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285895726] [2020-07-21 12:29:26,880 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 [2020-07-21 12:29:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:27,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 2931 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:29:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:27,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:27,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285895726] [2020-07-21 12:29:27,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:27,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:27,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303105155] [2020-07-21 12:29:27,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:27,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:27,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:27,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:27,807 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 3 states. [2020-07-21 12:29:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:28,188 INFO L93 Difference]: Finished difference Result 5960 states and 10322 transitions. [2020-07-21 12:29:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:28,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 322 [2020-07-21 12:29:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:28,233 INFO L225 Difference]: With dead ends: 5960 [2020-07-21 12:29:28,233 INFO L226 Difference]: Without dead ends: 4221 [2020-07-21 12:29:28,245 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 [2020-07-21 12:29:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2020-07-21 12:29:28,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 4121. [2020-07-21 12:29:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4121 states. [2020-07-21 12:29:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 7128 transitions. [2020-07-21 12:29:28,486 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 7128 transitions. Word has length 322 [2020-07-21 12:29:28,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:28,489 INFO L479 AbstractCegarLoop]: Abstraction has 4121 states and 7128 transitions. [2020-07-21 12:29:28,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:28,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 7128 transitions. [2020-07-21 12:29:28,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 12:29:28,506 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:28,506 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] [2020-07-21 12:29:28,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:28,723 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:28,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:28,724 INFO L82 PathProgramCache]: Analyzing trace with hash -24233743, now seen corresponding path program 1 times [2020-07-21 12:29:28,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:28,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861312357] [2020-07-21 12:29:28,726 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 [2020-07-21 12:29:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 2975 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:29:29,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:29,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:29,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861312357] [2020-07-21 12:29:29,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:29,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:29,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033529084] [2020-07-21 12:29:29,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:29,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:29,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:29,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:29,357 INFO L87 Difference]: Start difference. First operand 4121 states and 7128 transitions. Second operand 3 states. [2020-07-21 12:29:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:29,667 INFO L93 Difference]: Finished difference Result 10257 states and 17622 transitions. [2020-07-21 12:29:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:29,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 12:29:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:29,706 INFO L225 Difference]: With dead ends: 10257 [2020-07-21 12:29:29,707 INFO L226 Difference]: Without dead ends: 7153 [2020-07-21 12:29:29,719 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 [2020-07-21 12:29:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7153 states. [2020-07-21 12:29:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7153 to 6957. [2020-07-21 12:29:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6957 states. [2020-07-21 12:29:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 11956 transitions. [2020-07-21 12:29:29,971 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 11956 transitions. Word has length 342 [2020-07-21 12:29:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:29,973 INFO L479 AbstractCegarLoop]: Abstraction has 6957 states and 11956 transitions. [2020-07-21 12:29:29,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 11956 transitions. [2020-07-21 12:29:30,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-07-21 12:29:30,002 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:30,006 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] [2020-07-21 12:29:30,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:30,222 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash 828287305, now seen corresponding path program 1 times [2020-07-21 12:29:30,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:30,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054427771] [2020-07-21 12:29:30,225 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 [2020-07-21 12:29:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:30,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 3019 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:29:30,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:30,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:30,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054427771] [2020-07-21 12:29:30,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:30,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:30,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42353452] [2020-07-21 12:29:30,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:30,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:30,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:30,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:30,936 INFO L87 Difference]: Start difference. First operand 6957 states and 11956 transitions. Second operand 3 states. [2020-07-21 12:29:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:31,194 INFO L93 Difference]: Finished difference Result 12233 states and 20952 transitions. [2020-07-21 12:29:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:31,195 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 362 [2020-07-21 12:29:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:31,231 INFO L225 Difference]: With dead ends: 12233 [2020-07-21 12:29:31,231 INFO L226 Difference]: Without dead ends: 6961 [2020-07-21 12:29:31,242 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 [2020-07-21 12:29:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2020-07-21 12:29:31,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 6957. [2020-07-21 12:29:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6957 states. [2020-07-21 12:29:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 11940 transitions. [2020-07-21 12:29:31,440 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 11940 transitions. Word has length 362 [2020-07-21 12:29:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:31,441 INFO L479 AbstractCegarLoop]: Abstraction has 6957 states and 11940 transitions. [2020-07-21 12:29:31,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:31,441 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 11940 transitions. [2020-07-21 12:29:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-07-21 12:29:31,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:31,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:31,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:31,677 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:31,677 INFO L82 PathProgramCache]: Analyzing trace with hash -272409415, now seen corresponding path program 1 times [2020-07-21 12:29:31,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:31,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541292110] [2020-07-21 12:29:31,678 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 [2020-07-21 12:29:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:32,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 3019 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:29:32,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:32,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:32,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541292110] [2020-07-21 12:29:32,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:32,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:32,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882703416] [2020-07-21 12:29:32,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:32,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:32,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:32,804 INFO L87 Difference]: Start difference. First operand 6957 states and 11940 transitions. Second operand 3 states. [2020-07-21 12:29:33,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:33,165 INFO L93 Difference]: Finished difference Result 17761 states and 30370 transitions. [2020-07-21 12:29:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:33,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 362 [2020-07-21 12:29:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:33,211 INFO L225 Difference]: With dead ends: 17761 [2020-07-21 12:29:33,211 INFO L226 Difference]: Without dead ends: 12249 [2020-07-21 12:29:33,225 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 [2020-07-21 12:29:33,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12249 states. [2020-07-21 12:29:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12249 to 11861. [2020-07-21 12:29:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11861 states. [2020-07-21 12:29:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 20252 transitions. [2020-07-21 12:29:33,629 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 20252 transitions. Word has length 362 [2020-07-21 12:29:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:33,629 INFO L479 AbstractCegarLoop]: Abstraction has 11861 states and 20252 transitions. [2020-07-21 12:29:33,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 20252 transitions. [2020-07-21 12:29:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-07-21 12:29:33,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:33,668 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] [2020-07-21 12:29:33,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:33,884 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1152939603, now seen corresponding path program 1 times [2020-07-21 12:29:33,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:33,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366912308] [2020-07-21 12:29:33,885 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 [2020-07-21 12:29:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:34,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 3063 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:29:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:34,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:34,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366912308] [2020-07-21 12:29:34,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:34,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:34,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030110735] [2020-07-21 12:29:34,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:34,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:34,551 INFO L87 Difference]: Start difference. First operand 11861 states and 20252 transitions. Second operand 3 states. [2020-07-21 12:29:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:34,870 INFO L93 Difference]: Finished difference Result 21097 states and 35954 transitions. [2020-07-21 12:29:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:34,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 382 [2020-07-21 12:29:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:34,899 INFO L225 Difference]: With dead ends: 21097 [2020-07-21 12:29:34,899 INFO L226 Difference]: Without dead ends: 11865 [2020-07-21 12:29:34,919 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 [2020-07-21 12:29:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11865 states. [2020-07-21 12:29:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11865 to 11861. [2020-07-21 12:29:35,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11861 states. [2020-07-21 12:29:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 20220 transitions. [2020-07-21 12:29:35,254 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 20220 transitions. Word has length 382 [2020-07-21 12:29:35,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:35,263 INFO L479 AbstractCegarLoop]: Abstraction has 11861 states and 20220 transitions. [2020-07-21 12:29:35,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 20220 transitions. [2020-07-21 12:29:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-07-21 12:29:35,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:35,302 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] [2020-07-21 12:29:35,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:35,516 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:35,516 INFO L82 PathProgramCache]: Analyzing trace with hash -17279031, now seen corresponding path program 1 times [2020-07-21 12:29:35,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:35,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36323222] [2020-07-21 12:29:35,517 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 [2020-07-21 12:29:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:36,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 3063 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:29:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:36,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:36,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36323222] [2020-07-21 12:29:36,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:36,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:36,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634996674] [2020-07-21 12:29:36,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:36,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:36,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:36,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:36,173 INFO L87 Difference]: Start difference. First operand 11861 states and 20220 transitions. Second operand 3 states. [2020-07-21 12:29:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:36,621 INFO L93 Difference]: Finished difference Result 30541 states and 51968 transitions. [2020-07-21 12:29:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:36,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 382 [2020-07-21 12:29:36,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:36,680 INFO L225 Difference]: With dead ends: 30541 [2020-07-21 12:29:36,680 INFO L226 Difference]: Without dead ends: 20905 [2020-07-21 12:29:36,707 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 [2020-07-21 12:29:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20905 states. [2020-07-21 12:29:37,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20905 to 20133. [2020-07-21 12:29:37,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20133 states. [2020-07-21 12:29:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20133 states to 20133 states and 34156 transitions. [2020-07-21 12:29:37,387 INFO L78 Accepts]: Start accepts. Automaton has 20133 states and 34156 transitions. Word has length 382 [2020-07-21 12:29:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:37,388 INFO L479 AbstractCegarLoop]: Abstraction has 20133 states and 34156 transitions. [2020-07-21 12:29:37,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 20133 states and 34156 transitions. [2020-07-21 12:29:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-21 12:29:37,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:37,435 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] [2020-07-21 12:29:37,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:37,650 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:37,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:37,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1559974791, now seen corresponding path program 1 times [2020-07-21 12:29:37,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:37,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501025465] [2020-07-21 12:29:37,652 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 [2020-07-21 12:29:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:38,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 3107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:29:38,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:38,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:38,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501025465] [2020-07-21 12:29:38,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:38,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:38,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17127832] [2020-07-21 12:29:38,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:38,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:38,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:38,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:38,256 INFO L87 Difference]: Start difference. First operand 20133 states and 34156 transitions. Second operand 3 states. [2020-07-21 12:29:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:39,775 INFO L93 Difference]: Finished difference Result 51645 states and 87552 transitions. [2020-07-21 12:29:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:39,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 402 [2020-07-21 12:29:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:39,838 INFO L225 Difference]: With dead ends: 51645 [2020-07-21 12:29:39,838 INFO L226 Difference]: Without dead ends: 35145 [2020-07-21 12:29:39,875 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 [2020-07-21 12:29:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35145 states. [2020-07-21 12:29:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35145 to 33605. [2020-07-21 12:29:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 12:29:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56716 transitions. [2020-07-21 12:29:40,711 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56716 transitions. Word has length 402 [2020-07-21 12:29:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:40,712 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56716 transitions. [2020-07-21 12:29:40,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56716 transitions. [2020-07-21 12:29:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-21 12:29:40,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:40,773 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] [2020-07-21 12:29:40,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:40,987 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:40,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1323511675, now seen corresponding path program 1 times [2020-07-21 12:29:40,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:40,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291715444] [2020-07-21 12:29:40,989 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 [2020-07-21 12:29:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:41,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 3151 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:29:41,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:41,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:41,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291715444] [2020-07-21 12:29:41,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:41,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:41,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229719194] [2020-07-21 12:29:41,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:41,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:41,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:41,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:41,784 INFO L87 Difference]: Start difference. First operand 33605 states and 56716 transitions. Second operand 3 states. [2020-07-21 12:29:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:42,456 INFO L93 Difference]: Finished difference Result 60061 states and 101328 transitions. [2020-07-21 12:29:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:42,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 422 [2020-07-21 12:29:42,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:42,521 INFO L225 Difference]: With dead ends: 60061 [2020-07-21 12:29:42,522 INFO L226 Difference]: Without dead ends: 33609 [2020-07-21 12:29:42,573 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 [2020-07-21 12:29:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33609 states. [2020-07-21 12:29:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33609 to 33605. [2020-07-21 12:29:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 12:29:43,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56588 transitions. [2020-07-21 12:29:43,525 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56588 transitions. Word has length 422 [2020-07-21 12:29:43,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:43,526 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56588 transitions. [2020-07-21 12:29:43,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:43,526 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56588 transitions. [2020-07-21 12:29:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-21 12:29:43,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:43,563 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] [2020-07-21 12:29:43,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:43,775 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:43,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:43,776 INFO L82 PathProgramCache]: Analyzing trace with hash -541647871, now seen corresponding path program 1 times [2020-07-21 12:29:43,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:43,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959127487] [2020-07-21 12:29:43,778 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 [2020-07-21 12:29:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:44,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 3151 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:29:44,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:44,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:44,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959127487] [2020-07-21 12:29:44,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:44,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:29:44,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112605874] [2020-07-21 12:29:44,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:29:44,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:44,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:29:44,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:29:44,425 INFO L87 Difference]: Start difference. First operand 33605 states and 56588 transitions. Second operand 4 states. [2020-07-21 12:29:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:45,161 INFO L93 Difference]: Finished difference Result 66659 states and 112140 transitions. [2020-07-21 12:29:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:29:45,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 422 [2020-07-21 12:29:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:45,209 INFO L225 Difference]: With dead ends: 66659 [2020-07-21 12:29:45,209 INFO L226 Difference]: Without dead ends: 33605 [2020-07-21 12:29:45,267 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 [2020-07-21 12:29:45,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-21 12:29:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-21 12:29:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 12:29:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56523 transitions. [2020-07-21 12:29:46,944 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56523 transitions. Word has length 422 [2020-07-21 12:29:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:46,944 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56523 transitions. [2020-07-21 12:29:46,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:29:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56523 transitions. [2020-07-21 12:29:46,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 12:29:46,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:46,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:47,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:47,197 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:47,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1853231644, now seen corresponding path program 1 times [2020-07-21 12:29:47,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:47,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831964103] [2020-07-21 12:29:47,200 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 [2020-07-21 12:29:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:47,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 3239 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:47,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:47,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:47,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831964103] [2020-07-21 12:29:47,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:47,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:47,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266182669] [2020-07-21 12:29:47,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:47,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:47,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:47,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:47,876 INFO L87 Difference]: Start difference. First operand 33605 states and 56523 transitions. Second operand 3 states. [2020-07-21 12:29:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:48,523 INFO L93 Difference]: Finished difference Result 51931 states and 87335 transitions. [2020-07-21 12:29:48,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:48,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 12:29:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:48,562 INFO L225 Difference]: With dead ends: 51931 [2020-07-21 12:29:48,562 INFO L226 Difference]: Without dead ends: 33605 [2020-07-21 12:29:48,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-21 12:29:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-21 12:29:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 12:29:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56521 transitions. [2020-07-21 12:29:49,125 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56521 transitions. Word has length 486 [2020-07-21 12:29:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:49,125 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56521 transitions. [2020-07-21 12:29:49,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56521 transitions. [2020-07-21 12:29:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 12:29:49,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:49,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:49,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:49,355 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:49,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2105395092, now seen corresponding path program 1 times [2020-07-21 12:29:49,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:49,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556810793] [2020-07-21 12:29:49,358 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 [2020-07-21 12:29:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:49,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 3239 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:49,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:50,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:50,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556810793] [2020-07-21 12:29:50,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:50,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:50,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621050419] [2020-07-21 12:29:50,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:50,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:50,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:50,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:50,009 INFO L87 Difference]: Start difference. First operand 33605 states and 56521 transitions. Second operand 3 states. [2020-07-21 12:29:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:50,642 INFO L93 Difference]: Finished difference Result 51853 states and 87199 transitions. [2020-07-21 12:29:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:50,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 12:29:50,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:50,683 INFO L225 Difference]: With dead ends: 51853 [2020-07-21 12:29:50,684 INFO L226 Difference]: Without dead ends: 33605 [2020-07-21 12:29:50,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-21 12:29:51,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-21 12:29:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 12:29:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56517 transitions. [2020-07-21 12:29:51,224 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56517 transitions. Word has length 486 [2020-07-21 12:29:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:51,224 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56517 transitions. [2020-07-21 12:29:51,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56517 transitions. [2020-07-21 12:29:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 12:29:51,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:51,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:51,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:51,461 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:51,462 INFO L82 PathProgramCache]: Analyzing trace with hash -624922292, now seen corresponding path program 1 times [2020-07-21 12:29:51,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:51,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93374737] [2020-07-21 12:29:51,464 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 [2020-07-21 12:29:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:51,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 3239 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:51,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:53,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:53,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93374737] [2020-07-21 12:29:53,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:53,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:53,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764083859] [2020-07-21 12:29:53,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:53,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:53,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:53,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:53,070 INFO L87 Difference]: Start difference. First operand 33605 states and 56517 transitions. Second operand 3 states. [2020-07-21 12:29:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:53,517 INFO L93 Difference]: Finished difference Result 51385 states and 86391 transitions. [2020-07-21 12:29:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:53,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 12:29:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:53,573 INFO L225 Difference]: With dead ends: 51385 [2020-07-21 12:29:53,573 INFO L226 Difference]: Without dead ends: 33605 [2020-07-21 12:29:53,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33605 states. [2020-07-21 12:29:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33605 to 33605. [2020-07-21 12:29:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33605 states. [2020-07-21 12:29:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33605 states to 33605 states and 56501 transitions. [2020-07-21 12:29:54,128 INFO L78 Accepts]: Start accepts. Automaton has 33605 states and 56501 transitions. Word has length 486 [2020-07-21 12:29:54,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:54,129 INFO L479 AbstractCegarLoop]: Abstraction has 33605 states and 56501 transitions. [2020-07-21 12:29:54,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 33605 states and 56501 transitions. [2020-07-21 12:29:54,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 12:29:54,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:54,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:54,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:54,356 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:54,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:54,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1601272388, now seen corresponding path program 1 times [2020-07-21 12:29:54,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:54,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725800472] [2020-07-21 12:29:54,357 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 [2020-07-21 12:29:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:54,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 3239 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:29:54,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:55,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:55,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725800472] [2020-07-21 12:29:55,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:55,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:29:55,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122055367] [2020-07-21 12:29:55,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:29:55,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:55,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:29:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:29:55,290 INFO L87 Difference]: Start difference. First operand 33605 states and 56501 transitions. Second operand 7 states. [2020-07-21 12:29:59,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:59,541 INFO L93 Difference]: Finished difference Result 220708 states and 370599 transitions. [2020-07-21 12:29:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:29:59,541 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 486 [2020-07-21 12:29:59,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:59,774 INFO L225 Difference]: With dead ends: 220708 [2020-07-21 12:29:59,774 INFO L226 Difference]: Without dead ends: 189248 [2020-07-21 12:29:59,837 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 [2020-07-21 12:29:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189248 states. [2020-07-21 12:30:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189248 to 66439. [2020-07-21 12:30:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66439 states. [2020-07-21 12:30:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66439 states to 66439 states and 111086 transitions. [2020-07-21 12:30:04,325 INFO L78 Accepts]: Start accepts. Automaton has 66439 states and 111086 transitions. Word has length 486 [2020-07-21 12:30:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:04,326 INFO L479 AbstractCegarLoop]: Abstraction has 66439 states and 111086 transitions. [2020-07-21 12:30:04,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:30:04,326 INFO L276 IsEmpty]: Start isEmpty. Operand 66439 states and 111086 transitions. [2020-07-21 12:30:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 12:30:04,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:04,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:30:04,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:04,599 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash 434909845, now seen corresponding path program 1 times [2020-07-21 12:30:04,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:04,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538061795] [2020-07-21 12:30:04,601 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 [2020-07-21 12:30:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:05,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 3244 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:30:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:30:05,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:05,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538061795] [2020-07-21 12:30:05,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:05,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:30:05,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136085652] [2020-07-21 12:30:05,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:30:05,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:05,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:30:05,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:30:05,595 INFO L87 Difference]: Start difference. First operand 66439 states and 111086 transitions. Second operand 7 states. [2020-07-21 12:30:13,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:30:13,455 INFO L93 Difference]: Finished difference Result 220516 states and 369703 transitions. [2020-07-21 12:30:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:30:13,456 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-21 12:30:13,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:30:13,650 INFO L225 Difference]: With dead ends: 220516 [2020-07-21 12:30:13,651 INFO L226 Difference]: Without dead ends: 189248 [2020-07-21 12:30:13,697 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 [2020-07-21 12:30:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189248 states. [2020-07-21 12:30:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189248 to 98304. [2020-07-21 12:30:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98304 states. [2020-07-21 12:30:17,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98304 states to 98304 states and 164325 transitions. [2020-07-21 12:30:17,042 INFO L78 Accepts]: Start accepts. Automaton has 98304 states and 164325 transitions. Word has length 487 [2020-07-21 12:30:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:17,043 INFO L479 AbstractCegarLoop]: Abstraction has 98304 states and 164325 transitions. [2020-07-21 12:30:17,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:30:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 98304 states and 164325 transitions. [2020-07-21 12:30:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 12:30:17,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:17,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:30:17,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:17,323 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:17,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1664588137, now seen corresponding path program 1 times [2020-07-21 12:30:17,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:17,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602474863] [2020-07-21 12:30:17,325 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 [2020-07-21 12:30:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:17,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 3244 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:30:17,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:30:18,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:18,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602474863] [2020-07-21 12:30:18,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:18,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:30:18,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280226652] [2020-07-21 12:30:18,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:30:18,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:18,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:30:18,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:30:18,050 INFO L87 Difference]: Start difference. First operand 98304 states and 164325 transitions. Second operand 7 states. [2020-07-21 12:30:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:30:27,286 INFO L93 Difference]: Finished difference Result 251373 states and 421278 transitions. [2020-07-21 12:30:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:30:27,286 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-21 12:30:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:30:27,744 INFO L225 Difference]: With dead ends: 251373 [2020-07-21 12:30:27,744 INFO L226 Difference]: Without dead ends: 221113 [2020-07-21 12:30:27,800 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 [2020-07-21 12:30:27,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221113 states. [2020-07-21 12:30:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221113 to 129069. [2020-07-21 12:30:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129069 states. [2020-07-21 12:30:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129069 states to 129069 states and 215745 transitions. [2020-07-21 12:30:32,343 INFO L78 Accepts]: Start accepts. Automaton has 129069 states and 215745 transitions. Word has length 487 [2020-07-21 12:30:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:32,343 INFO L479 AbstractCegarLoop]: Abstraction has 129069 states and 215745 transitions. [2020-07-21 12:30:32,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:30:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 129069 states and 215745 transitions. [2020-07-21 12:30:32,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 12:30:32,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:32,476 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] [2020-07-21 12:30:32,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:32,677 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:32,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1064136043, now seen corresponding path program 1 times [2020-07-21 12:30:32,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:32,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230546692] [2020-07-21 12:30:32,680 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 [2020-07-21 12:30:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:33,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 3244 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:30:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:30:33,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:33,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230546692] [2020-07-21 12:30:33,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:33,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:30:33,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457501826] [2020-07-21 12:30:33,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:30:33,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:33,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:30:33,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:30:33,900 INFO L87 Difference]: Start difference. First operand 129069 states and 215745 transitions. Second operand 7 states. [2020-07-21 12:30:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:30:44,616 INFO L93 Difference]: Finished difference Result 279937 states and 468892 transitions. [2020-07-21 12:30:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:30:44,616 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-21 12:30:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:30:44,873 INFO L225 Difference]: With dead ends: 279937 [2020-07-21 12:30:44,873 INFO L226 Difference]: Without dead ends: 250445 [2020-07-21 12:30:44,937 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 [2020-07-21 12:30:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250445 states. [2020-07-21 12:30:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250445 to 159049. [2020-07-21 12:30:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159049 states. [2020-07-21 12:30:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159049 states to 159049 states and 265807 transitions. [2020-07-21 12:30:51,264 INFO L78 Accepts]: Start accepts. Automaton has 159049 states and 265807 transitions. Word has length 487 [2020-07-21 12:30:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:51,264 INFO L479 AbstractCegarLoop]: Abstraction has 159049 states and 265807 transitions. [2020-07-21 12:30:51,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:30:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 159049 states and 265807 transitions. [2020-07-21 12:30:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 12:30:52,175 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:52,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:30:52,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:52,376 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:52,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2070221461, now seen corresponding path program 1 times [2020-07-21 12:30:52,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:52,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262925424] [2020-07-21 12:30:52,378 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 [2020-07-21 12:30:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:52,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 3244 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:30:52,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:30:53,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:53,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262925424] [2020-07-21 12:30:53,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:53,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:30:53,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872879916] [2020-07-21 12:30:53,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:30:53,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:53,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:30:53,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:30:53,075 INFO L87 Difference]: Start difference. First operand 159049 states and 265807 transitions. Second operand 7 states. [2020-07-21 12:31:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:31:05,941 INFO L93 Difference]: Finished difference Result 310397 states and 519760 transitions. [2020-07-21 12:31:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:31:05,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-21 12:31:05,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:31:06,239 INFO L225 Difference]: With dead ends: 310397 [2020-07-21 12:31:06,239 INFO L226 Difference]: Without dead ends: 280905 [2020-07-21 12:31:06,312 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 [2020-07-21 12:31:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280905 states. [2020-07-21 12:31:14,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280905 to 190091. [2020-07-21 12:31:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190091 states. [2020-07-21 12:31:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190091 states to 190091 states and 317644 transitions. [2020-07-21 12:31:14,763 INFO L78 Accepts]: Start accepts. Automaton has 190091 states and 317644 transitions. Word has length 487 [2020-07-21 12:31:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:31:14,764 INFO L479 AbstractCegarLoop]: Abstraction has 190091 states and 317644 transitions. [2020-07-21 12:31:14,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:31:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 190091 states and 317644 transitions. [2020-07-21 12:31:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 12:31:14,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:31:14,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:31:15,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:31:15,126 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:31:15,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:31:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash 61917545, now seen corresponding path program 1 times [2020-07-21 12:31:15,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:31:15,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562800863] [2020-07-21 12:31:15,128 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 [2020-07-21 12:31:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:31:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 3244 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:31:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:31:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:31:15,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:31:15,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562800863] [2020-07-21 12:31:15,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:31:15,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:31:15,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969572306] [2020-07-21 12:31:15,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:31:15,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:31:15,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:31:15,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:31:15,842 INFO L87 Difference]: Start difference. First operand 190091 states and 317644 transitions. Second operand 7 states. [2020-07-21 12:31:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:31:30,997 INFO L93 Difference]: Finished difference Result 341529 states and 571732 transitions. [2020-07-21 12:31:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:31:30,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 487 [2020-07-21 12:31:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:31:31,283 INFO L225 Difference]: With dead ends: 341529 [2020-07-21 12:31:31,284 INFO L226 Difference]: Without dead ends: 312037 [2020-07-21 12:31:31,345 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 [2020-07-21 12:31:31,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312037 states. [2020-07-21 12:31:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312037 to 221508. [2020-07-21 12:31:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221508 states. [2020-07-21 12:31:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221508 states to 221508 states and 370099 transitions. [2020-07-21 12:31:41,929 INFO L78 Accepts]: Start accepts. Automaton has 221508 states and 370099 transitions. Word has length 487 [2020-07-21 12:31:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:31:41,930 INFO L479 AbstractCegarLoop]: Abstraction has 221508 states and 370099 transitions. [2020-07-21 12:31:41,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:31:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 221508 states and 370099 transitions. [2020-07-21 12:31:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 12:31:42,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:31:42,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:31:42,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:31:42,330 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:31:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:31:42,331 INFO L82 PathProgramCache]: Analyzing trace with hash 361727920, now seen corresponding path program 1 times [2020-07-21 12:31:42,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:31:42,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676217976] [2020-07-21 12:31:42,332 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 [2020-07-21 12:31:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:31:42,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 3249 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:31:42,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:31:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:31:42,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:31:42,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676217976] [2020-07-21 12:31:42,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:31:42,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:31:42,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993735520] [2020-07-21 12:31:42,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:31:42,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:31:42,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:31:42,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:31:42,957 INFO L87 Difference]: Start difference. First operand 221508 states and 370099 transitions. Second operand 3 states. [2020-07-21 12:31:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:31:51,188 INFO L93 Difference]: Finished difference Result 341741 states and 570937 transitions. [2020-07-21 12:31:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:31:51,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 12:31:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:31:51,320 INFO L225 Difference]: With dead ends: 341741 [2020-07-21 12:31:51,320 INFO L226 Difference]: Without dead ends: 123436 [2020-07-21 12:31:51,432 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 [2020-07-21 12:31:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123436 states. [2020-07-21 12:31:56,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123436 to 123434. [2020-07-21 12:31:56,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123434 states. [2020-07-21 12:31:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123434 states to 123434 states and 205799 transitions. [2020-07-21 12:31:56,639 INFO L78 Accepts]: Start accepts. Automaton has 123434 states and 205799 transitions. Word has length 488 [2020-07-21 12:31:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:31:56,640 INFO L479 AbstractCegarLoop]: Abstraction has 123434 states and 205799 transitions. [2020-07-21 12:31:56,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:31:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 123434 states and 205799 transitions. [2020-07-21 12:31:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 12:31:56,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:31:56,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:31:56,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:31:56,936 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:31:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:31:56,937 INFO L82 PathProgramCache]: Analyzing trace with hash 248393120, now seen corresponding path program 1 times [2020-07-21 12:31:56,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:31:56,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682463086] [2020-07-21 12:31:56,938 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 [2020-07-21 12:31:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:31:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 3249 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:31:57,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:31:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:31:57,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:31:57,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682463086] [2020-07-21 12:31:57,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:31:57,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:31:57,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076763891] [2020-07-21 12:31:57,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:31:57,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:31:57,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:31:57,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:31:57,885 INFO L87 Difference]: Start difference. First operand 123434 states and 205799 transitions. Second operand 3 states. [2020-07-21 12:32:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:04,513 INFO L93 Difference]: Finished difference Result 246170 states and 410361 transitions. [2020-07-21 12:32:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:32:04,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 12:32:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:04,639 INFO L225 Difference]: With dead ends: 246170 [2020-07-21 12:32:04,639 INFO L226 Difference]: Without dead ends: 123316 [2020-07-21 12:32:04,722 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 [2020-07-21 12:32:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123316 states. [2020-07-21 12:32:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123316 to 123316. [2020-07-21 12:32:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123316 states. [2020-07-21 12:32:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123316 states to 123316 states and 205342 transitions. [2020-07-21 12:32:09,913 INFO L78 Accepts]: Start accepts. Automaton has 123316 states and 205342 transitions. Word has length 488 [2020-07-21 12:32:09,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:32:09,913 INFO L479 AbstractCegarLoop]: Abstraction has 123316 states and 205342 transitions. [2020-07-21 12:32:09,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:32:09,913 INFO L276 IsEmpty]: Start isEmpty. Operand 123316 states and 205342 transitions. [2020-07-21 12:32:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 12:32:10,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:32:10,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:32:10,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:10,206 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:32:10,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:32:10,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1495583451, now seen corresponding path program 1 times [2020-07-21 12:32:10,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:32:10,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299439518] [2020-07-21 12:32:10,208 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 [2020-07-21 12:32:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:32:10,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 3257 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:32:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:32:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:32:11,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:32:11,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299439518] [2020-07-21 12:32:11,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:32:11,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:32:11,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656088930] [2020-07-21 12:32:11,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:32:11,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:32:11,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:32:11,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:32:11,149 INFO L87 Difference]: Start difference. First operand 123316 states and 205342 transitions. Second operand 3 states. [2020-07-21 12:32:13,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:13,819 INFO L93 Difference]: Finished difference Result 123322 states and 205345 transitions. [2020-07-21 12:32:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:32:13,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 12:32:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:13,878 INFO L225 Difference]: With dead ends: 123322 [2020-07-21 12:32:13,878 INFO L226 Difference]: Without dead ends: 61235 [2020-07-21 12:32:13,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:32:13,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61235 states. [2020-07-21 12:32:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61235 to 61233. [2020-07-21 12:32:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61233 states. [2020-07-21 12:32:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61233 states to 61233 states and 102035 transitions. [2020-07-21 12:32:18,965 INFO L78 Accepts]: Start accepts. Automaton has 61233 states and 102035 transitions. Word has length 492 [2020-07-21 12:32:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:32:18,966 INFO L479 AbstractCegarLoop]: Abstraction has 61233 states and 102035 transitions. [2020-07-21 12:32:18,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:32:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 61233 states and 102035 transitions. [2020-07-21 12:32:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 12:32:19,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:32:19,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:32:19,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:19,213 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:32:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:32:19,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1667862974, now seen corresponding path program 1 times [2020-07-21 12:32:19,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:32:19,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706465644] [2020-07-21 12:32:19,215 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 [2020-07-21 12:32:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:32:19,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 3265 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:32:19,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:32:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:32:19,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:32:19,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706465644] [2020-07-21 12:32:19,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:32:19,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:32:19,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374403965] [2020-07-21 12:32:19,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:32:19,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:32:19,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:32:19,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:32:19,914 INFO L87 Difference]: Start difference. First operand 61233 states and 102035 transitions. Second operand 3 states. [2020-07-21 12:32:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:21,314 INFO L93 Difference]: Finished difference Result 61239 states and 102038 transitions. [2020-07-21 12:32:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:32:21,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 12:32:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:21,344 INFO L225 Difference]: With dead ends: 61239 [2020-07-21 12:32:21,344 INFO L226 Difference]: Without dead ends: 30537 [2020-07-21 12:32:21,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:32:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30537 states. [2020-07-21 12:32:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30537 to 30535. [2020-07-21 12:32:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30535 states. [2020-07-21 12:32:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30535 states to 30535 states and 50928 transitions. [2020-07-21 12:32:22,553 INFO L78 Accepts]: Start accepts. Automaton has 30535 states and 50928 transitions. Word has length 496 [2020-07-21 12:32:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:32:22,553 INFO L479 AbstractCegarLoop]: Abstraction has 30535 states and 50928 transitions. [2020-07-21 12:32:22,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:32:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 30535 states and 50928 transitions. [2020-07-21 12:32:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 12:32:22,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:32:22,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:32:22,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:22,799 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:32:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:32:22,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1349161951, now seen corresponding path program 1 times [2020-07-21 12:32:22,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:32:22,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486652857] [2020-07-21 12:32:22,801 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 [2020-07-21 12:32:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:32:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 3273 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:32:23,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:32:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:32:23,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:32:23,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486652857] [2020-07-21 12:32:23,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:32:23,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:32:23,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382222594] [2020-07-21 12:32:23,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:32:23,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:32:23,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:32:23,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:32:23,553 INFO L87 Difference]: Start difference. First operand 30535 states and 50928 transitions. Second operand 3 states. [2020-07-21 12:32:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:24,608 INFO L93 Difference]: Finished difference Result 44886 states and 74861 transitions. [2020-07-21 12:32:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:32:24,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 12:32:24,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:24,623 INFO L225 Difference]: With dead ends: 44886 [2020-07-21 12:32:24,623 INFO L226 Difference]: Without dead ends: 15384 [2020-07-21 12:32:24,647 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 [2020-07-21 12:32:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15384 states. [2020-07-21 12:32:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15384 to 15382. [2020-07-21 12:32:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15382 states. [2020-07-21 12:32:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15382 states to 15382 states and 25622 transitions. [2020-07-21 12:32:25,231 INFO L78 Accepts]: Start accepts. Automaton has 15382 states and 25622 transitions. Word has length 500 [2020-07-21 12:32:25,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:32:25,232 INFO L479 AbstractCegarLoop]: Abstraction has 15382 states and 25622 transitions. [2020-07-21 12:32:25,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:32:25,232 INFO L276 IsEmpty]: Start isEmpty. Operand 15382 states and 25622 transitions. [2020-07-21 12:32:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 12:32:25,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:32:25,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:32:25,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:25,444 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:32:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:32:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1058528845, now seen corresponding path program 1 times [2020-07-21 12:32:25,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:32:25,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153375966] [2020-07-21 12:32:25,447 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 [2020-07-21 12:32:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:32:25,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 3274 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:32:25,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:32:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:32:26,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:32:26,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153375966] [2020-07-21 12:32:26,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:32:26,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:32:26,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103314901] [2020-07-21 12:32:26,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:32:26,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:32:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:32:26,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:32:26,048 INFO L87 Difference]: Start difference. First operand 15382 states and 25622 transitions. Second operand 3 states. [2020-07-21 12:32:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:26,847 INFO L93 Difference]: Finished difference Result 30100 states and 50095 transitions. [2020-07-21 12:32:26,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:32:26,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 12:32:26,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:26,860 INFO L225 Difference]: With dead ends: 30100 [2020-07-21 12:32:26,860 INFO L226 Difference]: Without dead ends: 15382 [2020-07-21 12:32:26,869 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 [2020-07-21 12:32:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15382 states. [2020-07-21 12:32:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15382 to 15382. [2020-07-21 12:32:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15382 states. [2020-07-21 12:32:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15382 states to 15382 states and 25621 transitions. [2020-07-21 12:32:27,452 INFO L78 Accepts]: Start accepts. Automaton has 15382 states and 25621 transitions. Word has length 501 [2020-07-21 12:32:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:32:27,452 INFO L479 AbstractCegarLoop]: Abstraction has 15382 states and 25621 transitions. [2020-07-21 12:32:27,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:32:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 15382 states and 25621 transitions. [2020-07-21 12:32:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 12:32:27,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:32:27,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:32:27,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:27,665 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:32:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:32:27,666 INFO L82 PathProgramCache]: Analyzing trace with hash 26522856, now seen corresponding path program 1 times [2020-07-21 12:32:27,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:32:27,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569270282] [2020-07-21 12:32:27,667 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 [2020-07-21 12:32:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:32:28,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:32:28,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:32:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:32:28,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:32:28,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569270282] [2020-07-21 12:32:28,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:32:28,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:32:28,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388810348] [2020-07-21 12:32:28,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:32:28,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:32:28,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:32:28,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:32:28,306 INFO L87 Difference]: Start difference. First operand 15382 states and 25621 transitions. Second operand 4 states. [2020-07-21 12:32:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:30,030 INFO L93 Difference]: Finished difference Result 44545 states and 74134 transitions. [2020-07-21 12:32:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:32:30,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-21 12:32:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:30,056 INFO L225 Difference]: With dead ends: 44545 [2020-07-21 12:32:30,056 INFO L226 Difference]: Without dead ends: 29908 [2020-07-21 12:32:30,070 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 [2020-07-21 12:32:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29908 states. [2020-07-21 12:32:31,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29908 to 27776. [2020-07-21 12:32:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27776 states. [2020-07-21 12:32:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27776 states to 27776 states and 46108 transitions. [2020-07-21 12:32:31,236 INFO L78 Accepts]: Start accepts. Automaton has 27776 states and 46108 transitions. Word has length 505 [2020-07-21 12:32:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:32:31,236 INFO L479 AbstractCegarLoop]: Abstraction has 27776 states and 46108 transitions. [2020-07-21 12:32:31,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:32:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand 27776 states and 46108 transitions. [2020-07-21 12:32:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 12:32:31,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:32:31,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:32:31,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:31,458 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:32:31,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:32:31,459 INFO L82 PathProgramCache]: Analyzing trace with hash -920176291, now seen corresponding path program 1 times [2020-07-21 12:32:31,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:32:31,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754098085] [2020-07-21 12:32:31,460 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 [2020-07-21 12:32:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:32:31,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:32:31,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:32:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:32:32,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:32:32,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754098085] [2020-07-21 12:32:32,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:32:32,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:32:32,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676095748] [2020-07-21 12:32:32,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:32:32,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:32:32,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:32:32,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:32:32,096 INFO L87 Difference]: Start difference. First operand 27776 states and 46108 transitions. Second operand 4 states. [2020-07-21 12:32:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:34,761 INFO L93 Difference]: Finished difference Result 81573 states and 135355 transitions. [2020-07-21 12:32:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:32:34,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 506 [2020-07-21 12:32:34,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:34,827 INFO L225 Difference]: With dead ends: 81573 [2020-07-21 12:32:34,828 INFO L226 Difference]: Without dead ends: 54542 [2020-07-21 12:32:34,858 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 [2020-07-21 12:32:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54542 states. [2020-07-21 12:32:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54542 to 50330. [2020-07-21 12:32:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50330 states. [2020-07-21 12:32:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50330 states to 50330 states and 83280 transitions. [2020-07-21 12:32:37,335 INFO L78 Accepts]: Start accepts. Automaton has 50330 states and 83280 transitions. Word has length 506 [2020-07-21 12:32:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:32:37,336 INFO L479 AbstractCegarLoop]: Abstraction has 50330 states and 83280 transitions. [2020-07-21 12:32:37,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:32:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 50330 states and 83280 transitions. [2020-07-21 12:32:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 12:32:37,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:32:37,374 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] [2020-07-21 12:32:37,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:37,575 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:32:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:32:37,576 INFO L82 PathProgramCache]: Analyzing trace with hash 304023201, now seen corresponding path program 1 times [2020-07-21 12:32:37,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:32:37,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741139446] [2020-07-21 12:32:37,577 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 [2020-07-21 12:32:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:32:38,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 3284 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:32:38,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:32:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:32:38,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:32:38,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741139446] [2020-07-21 12:32:38,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:32:38,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:32:38,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158985556] [2020-07-21 12:32:38,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:32:38,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:32:38,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:32:38,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:32:38,215 INFO L87 Difference]: Start difference. First operand 50330 states and 83280 transitions. Second operand 4 states. [2020-07-21 12:32:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:43,093 INFO L93 Difference]: Finished difference Result 148871 states and 246289 transitions. [2020-07-21 12:32:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:32:43,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-07-21 12:32:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:43,203 INFO L225 Difference]: With dead ends: 148871 [2020-07-21 12:32:43,203 INFO L226 Difference]: Without dead ends: 99286 [2020-07-21 12:32:43,251 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 [2020-07-21 12:32:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99286 states. [2020-07-21 12:32:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99286 to 90972. [2020-07-21 12:32:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90972 states. [2020-07-21 12:32:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90972 states to 90972 states and 150061 transitions. [2020-07-21 12:32:48,185 INFO L78 Accepts]: Start accepts. Automaton has 90972 states and 150061 transitions. Word has length 507 [2020-07-21 12:32:48,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:32:48,185 INFO L479 AbstractCegarLoop]: Abstraction has 90972 states and 150061 transitions. [2020-07-21 12:32:48,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:32:48,185 INFO L276 IsEmpty]: Start isEmpty. Operand 90972 states and 150061 transitions. [2020-07-21 12:32:48,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 12:32:48,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:32:48,251 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] [2020-07-21 12:32:48,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:48,452 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:32:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:32:48,453 INFO L82 PathProgramCache]: Analyzing trace with hash 106603766, now seen corresponding path program 1 times [2020-07-21 12:32:48,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:32:48,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664426438] [2020-07-21 12:32:48,454 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 [2020-07-21 12:32:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:32:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 3285 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:32:48,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:32:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:32:49,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:32:49,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664426438] [2020-07-21 12:32:49,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:32:49,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:32:49,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987648416] [2020-07-21 12:32:49,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:32:49,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:32:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:32:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:32:49,096 INFO L87 Difference]: Start difference. First operand 90972 states and 150061 transitions. Second operand 4 states. [2020-07-21 12:32:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:58,200 INFO L93 Difference]: Finished difference Result 266007 states and 438796 transitions. [2020-07-21 12:32:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:32:58,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 508 [2020-07-21 12:32:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:58,381 INFO L225 Difference]: With dead ends: 266007 [2020-07-21 12:32:58,382 INFO L226 Difference]: Without dead ends: 175780 [2020-07-21 12:32:58,461 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 [2020-07-21 12:32:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175780 states. [2020-07-21 12:33:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175780 to 161368. [2020-07-21 12:33:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161368 states. [2020-07-21 12:33:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161368 states to 161368 states and 265391 transitions. [2020-07-21 12:33:09,709 INFO L78 Accepts]: Start accepts. Automaton has 161368 states and 265391 transitions. Word has length 508 [2020-07-21 12:33:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:33:09,709 INFO L479 AbstractCegarLoop]: Abstraction has 161368 states and 265391 transitions. [2020-07-21 12:33:09,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:33:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 161368 states and 265391 transitions. [2020-07-21 12:33:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 12:33:10,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:33:10,210 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] [2020-07-21 12:33:10,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:33:10,411 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:33:10,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:33:10,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1211329446, now seen corresponding path program 1 times [2020-07-21 12:33:10,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:33:10,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174677655] [2020-07-21 12:33:10,413 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 [2020-07-21 12:33:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:33:10,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:33:10,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:33:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:33:11,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:33:11,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174677655] [2020-07-21 12:33:11,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:33:11,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:33:11,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713685806] [2020-07-21 12:33:11,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:33:11,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:33:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:33:11,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:33:11,049 INFO L87 Difference]: Start difference. First operand 161368 states and 265391 transitions. Second operand 4 states. [2020-07-21 12:33:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:33:25,100 INFO L93 Difference]: Finished difference Result 459391 states and 755792 transitions. [2020-07-21 12:33:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:33:25,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 509 [2020-07-21 12:33:25,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:33:25,412 INFO L225 Difference]: With dead ends: 459391 [2020-07-21 12:33:25,412 INFO L226 Difference]: Without dead ends: 302483 [2020-07-21 12:33:25,527 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 [2020-07-21 12:33:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302483 states. [2020-07-21 12:33:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302483 to 279841. [2020-07-21 12:33:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279841 states. [2020-07-21 12:33:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279841 states to 279841 states and 458998 transitions. [2020-07-21 12:33:44,555 INFO L78 Accepts]: Start accepts. Automaton has 279841 states and 458998 transitions. Word has length 509 [2020-07-21 12:33:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:33:44,555 INFO L479 AbstractCegarLoop]: Abstraction has 279841 states and 458998 transitions. [2020-07-21 12:33:44,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:33:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 279841 states and 458998 transitions. [2020-07-21 12:33:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 12:33:45,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:33:45,506 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] [2020-07-21 12:33:45,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:33:45,707 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:33:45,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:33:45,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1884302537, now seen corresponding path program 1 times [2020-07-21 12:33:45,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:33:45,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561947757] [2020-07-21 12:33:45,709 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 [2020-07-21 12:33:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:33:46,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:33:46,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:33:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:33:46,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:33:46,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561947757] [2020-07-21 12:33:46,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:33:46,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:33:46,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703009118] [2020-07-21 12:33:46,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:33:46,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:33:46,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:33:46,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:33:46,335 INFO L87 Difference]: Start difference. First operand 279841 states and 458998 transitions. Second operand 4 states. [2020-07-21 12:34:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:34:05,169 INFO L93 Difference]: Finished difference Result 396288 states and 650961 transitions. [2020-07-21 12:34:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:34:05,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 509 [2020-07-21 12:34:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:34:05,546 INFO L225 Difference]: With dead ends: 396288 [2020-07-21 12:34:05,546 INFO L226 Difference]: Without dead ends: 334275 [2020-07-21 12:34:05,639 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 [2020-07-21 12:34:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334275 states. [2020-07-21 12:34:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334275 to 312105. [2020-07-21 12:34:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312105 states. [2020-07-21 12:34:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312105 states to 312105 states and 511825 transitions. [2020-07-21 12:34:28,279 INFO L78 Accepts]: Start accepts. Automaton has 312105 states and 511825 transitions. Word has length 509 [2020-07-21 12:34:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:34:28,279 INFO L479 AbstractCegarLoop]: Abstraction has 312105 states and 511825 transitions. [2020-07-21 12:34:28,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:34:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 312105 states and 511825 transitions. [2020-07-21 12:34:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-21 12:34:28,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:34:28,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:34:28,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:34:28,757 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:34:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:34:28,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1849533820, now seen corresponding path program 1 times [2020-07-21 12:34:28,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:34:28,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298655669] [2020-07-21 12:34:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:34:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:34:29,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:34:29,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:34:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:34:29,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:34:29,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298655669] [2020-07-21 12:34:29,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:34:29,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:34:29,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820282372] [2020-07-21 12:34:29,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:34:29,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:34:29,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:34:29,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:34:29,876 INFO L87 Difference]: Start difference. First operand 312105 states and 511825 transitions. Second operand 3 states. [2020-07-21 12:34:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:34:54,610 INFO L93 Difference]: Finished difference Result 663822 states and 1089232 transitions. [2020-07-21 12:34:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:34:54,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 510 [2020-07-21 12:34:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:34:55,223 INFO L225 Difference]: With dead ends: 663822 [2020-07-21 12:34:55,224 INFO L226 Difference]: Without dead ends: 513081 [2020-07-21 12:34:55,401 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 [2020-07-21 12:34:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513081 states. [2020-07-21 12:35:29,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513081 to 512665. [2020-07-21 12:35:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512665 states. [2020-07-21 12:35:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512665 states to 512665 states and 840079 transitions. [2020-07-21 12:35:30,461 INFO L78 Accepts]: Start accepts. Automaton has 512665 states and 840079 transitions. Word has length 510 [2020-07-21 12:35:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:35:30,461 INFO L479 AbstractCegarLoop]: Abstraction has 512665 states and 840079 transitions. [2020-07-21 12:35:30,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:35:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 512665 states and 840079 transitions. [2020-07-21 12:35:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 12:35:30,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:35:30,860 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] [2020-07-21 12:35:31,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:35:31,073 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:35:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:35:31,074 INFO L82 PathProgramCache]: Analyzing trace with hash -728229181, now seen corresponding path program 1 times [2020-07-21 12:35:31,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:35:31,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375949076] [2020-07-21 12:35:31,075 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 [2020-07-21 12:35:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:35:32,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 3298 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:35:32,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:35:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:35:32,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:35:32,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375949076] [2020-07-21 12:35:32,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:35:32,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:35:32,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815711846] [2020-07-21 12:35:32,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:35:32,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:35:32,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:35:32,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:35:32,739 INFO L87 Difference]: Start difference. First operand 512665 states and 840079 transitions. Second operand 7 states. [2020-07-21 12:36:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:36:25,782 INFO L93 Difference]: Finished difference Result 1267997 states and 2075998 transitions. [2020-07-21 12:36:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:36:25,782 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 511 [2020-07-21 12:36:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:36:26,773 INFO L225 Difference]: With dead ends: 1267997 [2020-07-21 12:36:26,774 INFO L226 Difference]: Without dead ends: 756864 [2020-07-21 12:36:27,140 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 [2020-07-21 12:36:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756864 states. [2020-07-21 12:37:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756864 to 512665. [2020-07-21 12:37:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512665 states. [2020-07-21 12:37:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512665 states to 512665 states and 830993 transitions. [2020-07-21 12:37:13,419 INFO L78 Accepts]: Start accepts. Automaton has 512665 states and 830993 transitions. Word has length 511 [2020-07-21 12:37:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:37:13,420 INFO L479 AbstractCegarLoop]: Abstraction has 512665 states and 830993 transitions. [2020-07-21 12:37:13,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:37:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 512665 states and 830993 transitions. [2020-07-21 12:37:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 12:37:13,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:37:13,810 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] [2020-07-21 12:37:14,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:37:14,018 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:37:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:37:14,019 INFO L82 PathProgramCache]: Analyzing trace with hash -2103082301, now seen corresponding path program 1 times [2020-07-21 12:37:14,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:37:14,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597060370] [2020-07-21 12:37:14,020 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 [2020-07-21 12:37:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:37:14,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 3298 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:37:14,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:37:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:37:22,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:37:22,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597060370] [2020-07-21 12:37:22,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:37:22,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:37:22,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864306493] [2020-07-21 12:37:22,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:37:22,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:37:22,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:37:22,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:37:22,920 INFO L87 Difference]: Start difference. First operand 512665 states and 830993 transitions. Second operand 7 states. [2020-07-21 12:38:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:38:10,941 INFO L93 Difference]: Finished difference Result 961391 states and 1553187 transitions. [2020-07-21 12:38:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:38:10,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 511 [2020-07-21 12:38:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:38:11,813 INFO L225 Difference]: With dead ends: 961391 [2020-07-21 12:38:11,813 INFO L226 Difference]: Without dead ends: 748220 [2020-07-21 12:38:12,521 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 [2020-07-21 12:38:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748220 states. [2020-07-21 12:38:57,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748220 to 512665. [2020-07-21 12:38:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512665 states. [2020-07-21 12:38:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512665 states to 512665 states and 830991 transitions. [2020-07-21 12:38:58,515 INFO L78 Accepts]: Start accepts. Automaton has 512665 states and 830991 transitions. Word has length 511 [2020-07-21 12:38:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:38:58,515 INFO L479 AbstractCegarLoop]: Abstraction has 512665 states and 830991 transitions. [2020-07-21 12:38:58,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:38:58,516 INFO L276 IsEmpty]: Start isEmpty. Operand 512665 states and 830991 transitions. [2020-07-21 12:38:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 12:38:58,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:38:58,904 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] [2020-07-21 12:38:59,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:38:59,105 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:38:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:38:59,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1228696802, now seen corresponding path program 1 times [2020-07-21 12:38:59,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:38:59,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100280274] [2020-07-21 12:38:59,107 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 [2020-07-21 12:38:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:38:59,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:38:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:38:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:38:59,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:38:59,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100280274] [2020-07-21 12:38:59,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:38:59,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:38:59,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613030842] [2020-07-21 12:38:59,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:38:59,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:38:59,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:38:59,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:38:59,723 INFO L87 Difference]: Start difference. First operand 512665 states and 830991 transitions. Second operand 3 states. [2020-07-21 12:39:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:39:20,534 INFO L93 Difference]: Finished difference Result 512671 states and 830994 transitions. [2020-07-21 12:39:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:39:20,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 511 [2020-07-21 12:39:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:39:20,782 INFO L225 Difference]: With dead ends: 512671 [2020-07-21 12:39:20,783 INFO L226 Difference]: Without dead ends: 250380 [2020-07-21 12:39:20,917 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 [2020-07-21 12:39:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250380 states. [2020-07-21 12:39:36,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250380 to 250378. [2020-07-21 12:39:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250378 states. [2020-07-21 12:39:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250378 states to 250378 states and 406327 transitions. [2020-07-21 12:39:36,593 INFO L78 Accepts]: Start accepts. Automaton has 250378 states and 406327 transitions. Word has length 511 [2020-07-21 12:39:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:39:36,594 INFO L479 AbstractCegarLoop]: Abstraction has 250378 states and 406327 transitions. [2020-07-21 12:39:36,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:39:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 250378 states and 406327 transitions. [2020-07-21 12:39:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2020-07-21 12:39:36,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:39:36,763 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] [2020-07-21 12:39:36,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:39:36,964 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:39:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:39:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash 130218293, now seen corresponding path program 1 times [2020-07-21 12:39:36,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:39:36,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352290040] [2020-07-21 12:39:36,966 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 [2020-07-21 12:39:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:39:37,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 12:39:37,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:39:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:39:37,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:39:37,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352290040] [2020-07-21 12:39:37,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:39:37,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:39:37,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60479691] [2020-07-21 12:39:37,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:39:37,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:39:37,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:39:37,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:39:37,704 INFO L87 Difference]: Start difference. First operand 250378 states and 406327 transitions. Second operand 7 states. [2020-07-21 12:40:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:40:08,512 INFO L93 Difference]: Finished difference Result 609716 states and 990142 transitions. [2020-07-21 12:40:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:40:08,513 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 515 [2020-07-21 12:40:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:40:08,894 INFO L225 Difference]: With dead ends: 609716 [2020-07-21 12:40:08,895 INFO L226 Difference]: Without dead ends: 360044 [2020-07-21 12:40:09,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:40:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360044 states. [2020-07-21 12:40:30,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360044 to 301706. [2020-07-21 12:40:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301706 states. [2020-07-21 12:40:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301706 states to 301706 states and 488214 transitions. [2020-07-21 12:40:30,529 INFO L78 Accepts]: Start accepts. Automaton has 301706 states and 488214 transitions. Word has length 515 [2020-07-21 12:40:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:40:30,530 INFO L479 AbstractCegarLoop]: Abstraction has 301706 states and 488214 transitions. [2020-07-21 12:40:30,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:40:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 301706 states and 488214 transitions. [2020-07-21 12:40:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2020-07-21 12:40:30,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:40:30,759 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, 1, 1, 1] [2020-07-21 12:40:30,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:40:30,960 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:40:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:40:30,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1823776932, now seen corresponding path program 1 times [2020-07-21 12:40:30,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:40:30,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808416111] [2020-07-21 12:40:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:40:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:40:31,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 3300 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 12:40:31,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:40:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:40:32,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:40:32,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808416111] [2020-07-21 12:40:32,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:40:32,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:40:32,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221273213] [2020-07-21 12:40:32,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:40:32,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:40:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:40:32,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:40:32,194 INFO L87 Difference]: Start difference. First operand 301706 states and 488214 transitions. Second operand 7 states.