/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.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:32:09,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:32:09,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:32:09,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:32:09,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:32:09,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:32:09,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:32:09,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:32:09,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:32:09,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:32:09,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:32:09,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:32:09,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:32:09,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:32:09,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:32:09,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:32:09,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:32:09,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:32:09,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:32:09,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:32:09,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:32:09,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:32:09,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:32:09,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:32:09,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:32:09,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:32:09,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:32:09,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:32:09,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 12:32:09,928 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:32:09,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:32:09,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:32:09,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:32:09,935 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:32:09,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:32:09,935 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:32:09,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:32:09,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:32:09,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:32:09,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:32:09,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:32:09,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:32:09,939 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:32:09,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:32:09,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:32:09,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:32:09,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:32:09,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:32:09,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:32:09,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:32:09,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:32:09,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:32:09,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:32:09,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:32:09,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:32:09,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:09,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:32:09,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:32:09,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 12:32:10,229 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:32:10,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:32:10,251 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:32:10,252 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:32:10,252 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:32:10,253 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:32:10,314 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6a3146f3/5995789512f34d6e9aa8960984b5aaf2/FLAG6e5ba8850 [2020-07-20 12:32:10,878 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:32:10,879 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:32:10,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6a3146f3/5995789512f34d6e9aa8960984b5aaf2/FLAG6e5ba8850 [2020-07-20 12:32:11,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6a3146f3/5995789512f34d6e9aa8960984b5aaf2 [2020-07-20 12:32:11,093 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:32:11,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:32:11,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:32:11,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:32:11,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:32:11,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:32:11" (1/1) ... [2020-07-20 12:32:11,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a20cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:11, skipping insertion in model container [2020-07-20 12:32:11,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:32:11" (1/1) ... [2020-07-20 12:32:11,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:32:11,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:32:12,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:32:12,210 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:32:12,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:32:13,007 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:32:13,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:13 WrapperNode [2020-07-20 12:32:13,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:32:13,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:32:13,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:32:13,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:32:13,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:13" (1/1) ... [2020-07-20 12:32:13,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:13" (1/1) ... [2020-07-20 12:32:13,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:13" (1/1) ... [2020-07-20 12:32:13,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:13" (1/1) ... [2020-07-20 12:32:13,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:13" (1/1) ... [2020-07-20 12:32:13,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:13" (1/1) ... [2020-07-20 12:32:13,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:13" (1/1) ... [2020-07-20 12:32:13,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:32:13,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:32:13,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:32:13,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:32:13,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:32:13,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:32:13,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:32:13,369 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:32:13,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:32:13,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:32:13,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 12:32:13,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 12:32:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 12:32:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 12:32:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:32:13,373 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:32:13,373 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 12:32:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 12:32:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 12:32:13,375 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 12:32:13,376 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 12:32:13,376 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 12:32:13,377 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 12:32:13,377 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 12:32:13,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:32:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:32:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:32:15,944 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:32:15,944 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 12:32:15,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:32:15 BoogieIcfgContainer [2020-07-20 12:32:15,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:32:15,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:32:15,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:32:15,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:32:15,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:32:11" (1/3) ... [2020-07-20 12:32:15,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2944f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:32:15, skipping insertion in model container [2020-07-20 12:32:15,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:32:13" (2/3) ... [2020-07-20 12:32:15,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2944f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:32:15, skipping insertion in model container [2020-07-20 12:32:15,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:32:15" (3/3) ... [2020-07-20 12:32:15,974 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:32:15,985 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:32:16,000 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:32:16,015 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:32:16,077 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:32:16,078 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:32:16,078 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:32:16,078 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:32:16,078 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:32:16,078 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:32:16,078 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:32:16,079 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:32:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-07-20 12:32:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:32:16,144 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:16,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:16,146 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:16,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-07-20 12:32:16,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:16,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057546885] [2020-07-20 12:32:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:16,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:32:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:16,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:16,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057546885] [2020-07-20 12:32:16,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:16,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:16,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078168458] [2020-07-20 12:32:16,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:16,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:16,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:16,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:16,946 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 3 states. [2020-07-20 12:32:17,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:17,424 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-07-20 12:32:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:17,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 12:32:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:17,466 INFO L225 Difference]: With dead ends: 1527 [2020-07-20 12:32:17,466 INFO L226 Difference]: Without dead ends: 1311 [2020-07-20 12:32:17,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-07-20 12:32:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-07-20 12:32:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-07-20 12:32:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-07-20 12:32:17,620 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-07-20 12:32:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:17,624 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-07-20 12:32:17,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-07-20 12:32:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:32:17,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:17,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:17,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:17,852 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:17,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-07-20 12:32:17,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:17,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621471250] [2020-07-20 12:32:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:18,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:32:18,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:18,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:18,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621471250] [2020-07-20 12:32:18,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:18,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:18,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196249488] [2020-07-20 12:32:18,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:18,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:18,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:18,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:18,390 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 3 states. [2020-07-20 12:32:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:18,583 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-07-20 12:32:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:18,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 12:32:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:18,599 INFO L225 Difference]: With dead ends: 2683 [2020-07-20 12:32:18,599 INFO L226 Difference]: Without dead ends: 2301 [2020-07-20 12:32:18,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:18,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-07-20 12:32:18,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-07-20 12:32:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-07-20 12:32:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-07-20 12:32:18,705 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-07-20 12:32:18,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:18,706 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-07-20 12:32:18,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-07-20 12:32:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:32:18,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:18,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:18,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:18,933 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:18,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:18,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-07-20 12:32:18,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:18,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185413629] [2020-07-20 12:32:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 2054 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:32:19,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:19,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:19,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185413629] [2020-07-20 12:32:19,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:19,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:19,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038720648] [2020-07-20 12:32:19,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:19,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:19,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:19,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:19,465 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 3 states. [2020-07-20 12:32:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:19,727 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-07-20 12:32:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:19,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 12:32:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:19,751 INFO L225 Difference]: With dead ends: 4867 [2020-07-20 12:32:19,751 INFO L226 Difference]: Without dead ends: 4201 [2020-07-20 12:32:19,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-07-20 12:32:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-07-20 12:32:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-07-20 12:32:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-07-20 12:32:19,984 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-07-20 12:32:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:19,985 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-07-20 12:32:19,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-07-20 12:32:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 12:32:20,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:20,005 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] [2020-07-20 12:32:20,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:20,218 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:20,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-07-20 12:32:20,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:20,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998221084] [2020-07-20 12:32:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:20,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:32:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:20,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:20,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998221084] [2020-07-20 12:32:20,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:20,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:32:20,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134451939] [2020-07-20 12:32:20,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:32:20,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:20,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:32:20,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:32:20,765 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 4 states. [2020-07-20 12:32:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:21,200 INFO L93 Difference]: Finished difference Result 12417 states and 19251 transitions. [2020-07-20 12:32:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:32:21,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 12:32:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:21,256 INFO L225 Difference]: With dead ends: 12417 [2020-07-20 12:32:21,256 INFO L226 Difference]: Without dead ends: 8231 [2020-07-20 12:32:21,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:32:21,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8231 states. [2020-07-20 12:32:21,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8231 to 8229. [2020-07-20 12:32:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2020-07-20 12:32:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 12694 transitions. [2020-07-20 12:32:21,749 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 12694 transitions. Word has length 330 [2020-07-20 12:32:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:21,750 INFO L479 AbstractCegarLoop]: Abstraction has 8229 states and 12694 transitions. [2020-07-20 12:32:21,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:32:21,750 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 12694 transitions. [2020-07-20 12:32:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 12:32:21,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:21,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:21,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:21,982 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:21,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1672602794, now seen corresponding path program 1 times [2020-07-20 12:32:21,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:21,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398223538] [2020-07-20 12:32:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:22,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 2058 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:22,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:22,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398223538] [2020-07-20 12:32:22,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:22,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:22,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092731597] [2020-07-20 12:32:22,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:22,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:22,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:22,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:22,531 INFO L87 Difference]: Start difference. First operand 8229 states and 12694 transitions. Second operand 3 states. [2020-07-20 12:32:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:23,111 INFO L93 Difference]: Finished difference Result 24215 states and 37281 transitions. [2020-07-20 12:32:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:23,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 12:32:23,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:23,217 INFO L225 Difference]: With dead ends: 24215 [2020-07-20 12:32:23,217 INFO L226 Difference]: Without dead ends: 16126 [2020-07-20 12:32:23,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16126 states. [2020-07-20 12:32:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16126 to 16124. [2020-07-20 12:32:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16124 states. [2020-07-20 12:32:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16124 states to 16124 states and 24722 transitions. [2020-07-20 12:32:23,982 INFO L78 Accepts]: Start accepts. Automaton has 16124 states and 24722 transitions. Word has length 332 [2020-07-20 12:32:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:23,991 INFO L479 AbstractCegarLoop]: Abstraction has 16124 states and 24722 transitions. [2020-07-20 12:32:23,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:23,991 INFO L276 IsEmpty]: Start isEmpty. Operand 16124 states and 24722 transitions. [2020-07-20 12:32:24,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 12:32:24,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:24,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:24,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:24,243 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:24,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1778588241, now seen corresponding path program 1 times [2020-07-20 12:32:24,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:24,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053210309] [2020-07-20 12:32:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:24,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:24,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:24,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:24,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053210309] [2020-07-20 12:32:24,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:24,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:24,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497257823] [2020-07-20 12:32:24,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:24,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:24,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:24,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:24,787 INFO L87 Difference]: Start difference. First operand 16124 states and 24722 transitions. Second operand 3 states. [2020-07-20 12:32:25,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:25,530 INFO L93 Difference]: Finished difference Result 48213 states and 73890 transitions. [2020-07-20 12:32:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:25,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 12:32:25,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:25,759 INFO L225 Difference]: With dead ends: 48213 [2020-07-20 12:32:25,759 INFO L226 Difference]: Without dead ends: 32116 [2020-07-20 12:32:25,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32116 states. [2020-07-20 12:32:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32116 to 16135. [2020-07-20 12:32:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16135 states. [2020-07-20 12:32:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16135 states to 16135 states and 24737 transitions. [2020-07-20 12:32:26,510 INFO L78 Accepts]: Start accepts. Automaton has 16135 states and 24737 transitions. Word has length 332 [2020-07-20 12:32:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:26,511 INFO L479 AbstractCegarLoop]: Abstraction has 16135 states and 24737 transitions. [2020-07-20 12:32:26,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 16135 states and 24737 transitions. [2020-07-20 12:32:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 12:32:26,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:26,540 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] [2020-07-20 12:32:26,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:26,753 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:26,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1401798367, now seen corresponding path program 1 times [2020-07-20 12:32:26,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:26,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023446973] [2020-07-20 12:32:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:27,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:27,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:27,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:27,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023446973] [2020-07-20 12:32:27,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:27,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:27,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141312767] [2020-07-20 12:32:27,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:27,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:27,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:27,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:27,869 INFO L87 Difference]: Start difference. First operand 16135 states and 24737 transitions. Second operand 3 states. [2020-07-20 12:32:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:28,710 INFO L93 Difference]: Finished difference Result 48310 states and 74057 transitions. [2020-07-20 12:32:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:28,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-20 12:32:28,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:28,772 INFO L225 Difference]: With dead ends: 48310 [2020-07-20 12:32:28,772 INFO L226 Difference]: Without dead ends: 32225 [2020-07-20 12:32:28,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32225 states. [2020-07-20 12:32:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32225 to 16151. [2020-07-20 12:32:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16151 states. [2020-07-20 12:32:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24756 transitions. [2020-07-20 12:32:29,503 INFO L78 Accepts]: Start accepts. Automaton has 16151 states and 24756 transitions. Word has length 333 [2020-07-20 12:32:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:29,503 INFO L479 AbstractCegarLoop]: Abstraction has 16151 states and 24756 transitions. [2020-07-20 12:32:29,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 16151 states and 24756 transitions. [2020-07-20 12:32:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 12:32:29,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:29,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:29,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:29,814 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:29,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:29,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1472246491, now seen corresponding path program 1 times [2020-07-20 12:32:29,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:29,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286845097] [2020-07-20 12:32:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:30,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:30,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:30,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:30,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286845097] [2020-07-20 12:32:30,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:30,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:30,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735083652] [2020-07-20 12:32:30,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:30,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:30,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:30,228 INFO L87 Difference]: Start difference. First operand 16151 states and 24756 transitions. Second operand 3 states. [2020-07-20 12:32:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:31,027 INFO L93 Difference]: Finished difference Result 47564 states and 72785 transitions. [2020-07-20 12:32:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:31,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 12:32:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:31,101 INFO L225 Difference]: With dead ends: 47564 [2020-07-20 12:32:31,101 INFO L226 Difference]: Without dead ends: 31610 [2020-07-20 12:32:31,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31610 states. [2020-07-20 12:32:32,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31610 to 31608. [2020-07-20 12:32:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31608 states. [2020-07-20 12:32:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31608 states to 31608 states and 48140 transitions. [2020-07-20 12:32:32,571 INFO L78 Accepts]: Start accepts. Automaton has 31608 states and 48140 transitions. Word has length 334 [2020-07-20 12:32:32,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:32,572 INFO L479 AbstractCegarLoop]: Abstraction has 31608 states and 48140 transitions. [2020-07-20 12:32:32,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 31608 states and 48140 transitions. [2020-07-20 12:32:32,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 12:32:32,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:32,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:32,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:32,833 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:32,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1502102914, now seen corresponding path program 1 times [2020-07-20 12:32:32,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:32,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85103371] [2020-07-20 12:32:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:33,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:32:33,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:33,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:33,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85103371] [2020-07-20 12:32:33,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:33,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:32:33,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253837078] [2020-07-20 12:32:33,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:32:33,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:33,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:32:33,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:32:33,243 INFO L87 Difference]: Start difference. First operand 31608 states and 48140 transitions. Second operand 4 states. [2020-07-20 12:32:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:34,526 INFO L93 Difference]: Finished difference Result 90298 states and 137296 transitions. [2020-07-20 12:32:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:32:34,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 12:32:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:34,612 INFO L225 Difference]: With dead ends: 90298 [2020-07-20 12:32:34,612 INFO L226 Difference]: Without dead ends: 59196 [2020-07-20 12:32:34,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:32:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59196 states. [2020-07-20 12:32:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59196 to 31857. [2020-07-20 12:32:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31857 states. [2020-07-20 12:32:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31857 states to 31857 states and 48559 transitions. [2020-07-20 12:32:36,947 INFO L78 Accepts]: Start accepts. Automaton has 31857 states and 48559 transitions. Word has length 334 [2020-07-20 12:32:36,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:36,948 INFO L479 AbstractCegarLoop]: Abstraction has 31857 states and 48559 transitions. [2020-07-20 12:32:36,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:32:36,948 INFO L276 IsEmpty]: Start isEmpty. Operand 31857 states and 48559 transitions. [2020-07-20 12:32:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 12:32:36,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:36,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:37,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:37,173 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:37,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:37,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1975409793, now seen corresponding path program 1 times [2020-07-20 12:32:37,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:37,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153760886] [2020-07-20 12:32:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:37,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 2074 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:32:37,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:37,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:37,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153760886] [2020-07-20 12:32:37,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:37,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:32:37,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53447043] [2020-07-20 12:32:37,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:32:37,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:37,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:32:37,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:32:37,940 INFO L87 Difference]: Start difference. First operand 31857 states and 48559 transitions. Second operand 8 states. [2020-07-20 12:32:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:42,238 INFO L93 Difference]: Finished difference Result 104401 states and 160979 transitions. [2020-07-20 12:32:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:32:42,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 336 [2020-07-20 12:32:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:42,334 INFO L225 Difference]: With dead ends: 104401 [2020-07-20 12:32:42,335 INFO L226 Difference]: Without dead ends: 74579 [2020-07-20 12:32:42,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:32:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74579 states. [2020-07-20 12:32:45,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74579 to 46533. [2020-07-20 12:32:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46533 states. [2020-07-20 12:32:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46533 states to 46533 states and 70487 transitions. [2020-07-20 12:32:45,462 INFO L78 Accepts]: Start accepts. Automaton has 46533 states and 70487 transitions. Word has length 336 [2020-07-20 12:32:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:45,463 INFO L479 AbstractCegarLoop]: Abstraction has 46533 states and 70487 transitions. [2020-07-20 12:32:45,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:32:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 46533 states and 70487 transitions. [2020-07-20 12:32:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 12:32:45,499 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:45,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:45,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:45,708 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1507143924, now seen corresponding path program 1 times [2020-07-20 12:32:45,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:45,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682883589] [2020-07-20 12:32:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:46,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:46,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:46,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682883589] [2020-07-20 12:32:46,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:46,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:46,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814968300] [2020-07-20 12:32:46,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:46,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:46,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:46,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:46,138 INFO L87 Difference]: Start difference. First operand 46533 states and 70487 transitions. Second operand 3 states. [2020-07-20 12:32:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:48,781 INFO L93 Difference]: Finished difference Result 110589 states and 167989 transitions. [2020-07-20 12:32:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:48,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 12:32:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:48,857 INFO L225 Difference]: With dead ends: 110589 [2020-07-20 12:32:48,857 INFO L226 Difference]: Without dead ends: 65811 [2020-07-20 12:32:48,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65811 states. [2020-07-20 12:32:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65811 to 54993. [2020-07-20 12:32:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54993 states. [2020-07-20 12:32:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54993 states to 54993 states and 84067 transitions. [2020-07-20 12:32:52,594 INFO L78 Accepts]: Start accepts. Automaton has 54993 states and 84067 transitions. Word has length 336 [2020-07-20 12:32:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:32:52,595 INFO L479 AbstractCegarLoop]: Abstraction has 54993 states and 84067 transitions. [2020-07-20 12:32:52,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:32:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 54993 states and 84067 transitions. [2020-07-20 12:32:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 12:32:52,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:32:52,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:32:52,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:52,849 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:32:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:32:52,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1980323331, now seen corresponding path program 1 times [2020-07-20 12:32:52,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:32:52,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767337698] [2020-07-20 12:32:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:32:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:32:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:32:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:32:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:32:53,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:32:53,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767337698] [2020-07-20 12:32:53,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:32:53,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:32:53,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603049834] [2020-07-20 12:32:53,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:32:53,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:32:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:32:53,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:53,237 INFO L87 Difference]: Start difference. First operand 54993 states and 84067 transitions. Second operand 3 states. [2020-07-20 12:32:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:32:57,740 INFO L93 Difference]: Finished difference Result 163467 states and 249552 transitions. [2020-07-20 12:32:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:32:57,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 12:32:57,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:32:57,861 INFO L225 Difference]: With dead ends: 163467 [2020-07-20 12:32:57,861 INFO L226 Difference]: Without dead ends: 109237 [2020-07-20 12:32:57,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:32:57,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109237 states. [2020-07-20 12:33:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109237 to 55097. [2020-07-20 12:33:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55097 states. [2020-07-20 12:33:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55097 states to 55097 states and 84203 transitions. [2020-07-20 12:33:02,507 INFO L78 Accepts]: Start accepts. Automaton has 55097 states and 84203 transitions. Word has length 336 [2020-07-20 12:33:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:02,507 INFO L479 AbstractCegarLoop]: Abstraction has 55097 states and 84203 transitions. [2020-07-20 12:33:02,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:33:02,507 INFO L276 IsEmpty]: Start isEmpty. Operand 55097 states and 84203 transitions. [2020-07-20 12:33:02,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 12:33:02,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:02,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:33:02,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:02,739 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:02,740 INFO L82 PathProgramCache]: Analyzing trace with hash -769888141, now seen corresponding path program 1 times [2020-07-20 12:33:02,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:02,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124689245] [2020-07-20 12:33:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:03,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:33:03,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:03,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:03,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124689245] [2020-07-20 12:33:03,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:03,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:33:03,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556958994] [2020-07-20 12:33:03,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:33:03,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:03,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:33:03,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:33:03,202 INFO L87 Difference]: Start difference. First operand 55097 states and 84203 transitions. Second operand 3 states. [2020-07-20 12:33:07,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:07,973 INFO L93 Difference]: Finished difference Result 163600 states and 249717 transitions. [2020-07-20 12:33:07,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:33:07,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-20 12:33:07,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:08,090 INFO L225 Difference]: With dead ends: 163600 [2020-07-20 12:33:08,090 INFO L226 Difference]: Without dead ends: 109357 [2020-07-20 12:33:08,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:33:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109357 states. [2020-07-20 12:33:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109357 to 55239. [2020-07-20 12:33:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55239 states. [2020-07-20 12:33:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55239 states to 55239 states and 84374 transitions. [2020-07-20 12:33:13,058 INFO L78 Accepts]: Start accepts. Automaton has 55239 states and 84374 transitions. Word has length 337 [2020-07-20 12:33:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:13,059 INFO L479 AbstractCegarLoop]: Abstraction has 55239 states and 84374 transitions. [2020-07-20 12:33:13,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:33:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 55239 states and 84374 transitions. [2020-07-20 12:33:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 12:33:13,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:13,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:33:13,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:13,289 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:13,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1319224410, now seen corresponding path program 1 times [2020-07-20 12:33:13,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:13,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793790694] [2020-07-20 12:33:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:13,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:33:13,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:13,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:13,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793790694] [2020-07-20 12:33:13,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:13,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:33:13,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244558627] [2020-07-20 12:33:13,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:33:13,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:13,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:33:13,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:33:13,840 INFO L87 Difference]: Start difference. First operand 55239 states and 84374 transitions. Second operand 8 states. [2020-07-20 12:33:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:22,370 INFO L93 Difference]: Finished difference Result 167105 states and 257024 transitions. [2020-07-20 12:33:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:33:22,370 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 338 [2020-07-20 12:33:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:22,530 INFO L225 Difference]: With dead ends: 167105 [2020-07-20 12:33:22,530 INFO L226 Difference]: Without dead ends: 140455 [2020-07-20 12:33:22,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:33:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140455 states. [2020-07-20 12:33:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140455 to 80593. [2020-07-20 12:33:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80593 states. [2020-07-20 12:33:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80593 states to 80593 states and 123220 transitions. [2020-07-20 12:33:27,420 INFO L78 Accepts]: Start accepts. Automaton has 80593 states and 123220 transitions. Word has length 338 [2020-07-20 12:33:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:27,420 INFO L479 AbstractCegarLoop]: Abstraction has 80593 states and 123220 transitions. [2020-07-20 12:33:27,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:33:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 80593 states and 123220 transitions. [2020-07-20 12:33:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 12:33:27,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:27,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:33:27,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:27,657 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:27,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1178643344, now seen corresponding path program 1 times [2020-07-20 12:33:27,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:27,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581599843] [2020-07-20 12:33:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:27,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:33:27,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:28,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:28,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581599843] [2020-07-20 12:33:28,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:28,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:33:28,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036660005] [2020-07-20 12:33:28,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:33:28,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:28,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:33:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:33:28,060 INFO L87 Difference]: Start difference. First operand 80593 states and 123220 transitions. Second operand 3 states. [2020-07-20 12:33:36,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:36,104 INFO L93 Difference]: Finished difference Result 194837 states and 298942 transitions. [2020-07-20 12:33:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:33:36,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-20 12:33:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:36,239 INFO L225 Difference]: With dead ends: 194837 [2020-07-20 12:33:36,239 INFO L226 Difference]: Without dead ends: 116393 [2020-07-20 12:33:36,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:33:36,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116393 states. [2020-07-20 12:33:42,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116393 to 100167. [2020-07-20 12:33:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100167 states. [2020-07-20 12:33:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100167 states to 100167 states and 153666 transitions. [2020-07-20 12:33:42,277 INFO L78 Accepts]: Start accepts. Automaton has 100167 states and 153666 transitions. Word has length 338 [2020-07-20 12:33:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:42,278 INFO L479 AbstractCegarLoop]: Abstraction has 100167 states and 153666 transitions. [2020-07-20 12:33:42,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:33:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 100167 states and 153666 transitions. [2020-07-20 12:33:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 12:33:42,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:42,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:33:42,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:42,516 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:42,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:42,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1840473814, now seen corresponding path program 1 times [2020-07-20 12:33:42,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:42,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564954997] [2020-07-20 12:33:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:42,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:33:42,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:42,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:42,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564954997] [2020-07-20 12:33:42,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:42,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:33:42,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407322932] [2020-07-20 12:33:42,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:33:42,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:42,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:33:42,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:33:42,985 INFO L87 Difference]: Start difference. First operand 100167 states and 153666 transitions. Second operand 4 states. [2020-07-20 12:33:49,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:33:49,472 INFO L93 Difference]: Finished difference Result 192961 states and 295690 transitions. [2020-07-20 12:33:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:33:49,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-20 12:33:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:33:49,584 INFO L225 Difference]: With dead ends: 192961 [2020-07-20 12:33:49,584 INFO L226 Difference]: Without dead ends: 93770 [2020-07-20 12:33:49,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:33:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93770 states. [2020-07-20 12:33:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93770 to 93728. [2020-07-20 12:33:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93728 states. [2020-07-20 12:33:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93728 states to 93728 states and 143558 transitions. [2020-07-20 12:33:58,464 INFO L78 Accepts]: Start accepts. Automaton has 93728 states and 143558 transitions. Word has length 338 [2020-07-20 12:33:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:33:58,464 INFO L479 AbstractCegarLoop]: Abstraction has 93728 states and 143558 transitions. [2020-07-20 12:33:58,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:33:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 93728 states and 143558 transitions. [2020-07-20 12:33:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 12:33:58,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:33:58,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:33:58,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:58,698 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:33:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:33:58,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1731573835, now seen corresponding path program 1 times [2020-07-20 12:33:58,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:33:58,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924994896] [2020-07-20 12:33:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:33:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:33:59,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:33:59,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:33:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:33:59,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:33:59,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924994896] [2020-07-20 12:33:59,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:33:59,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:33:59,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019693651] [2020-07-20 12:33:59,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:33:59,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:33:59,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:33:59,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:33:59,153 INFO L87 Difference]: Start difference. First operand 93728 states and 143558 transitions. Second operand 4 states. [2020-07-20 12:34:09,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:34:09,624 INFO L93 Difference]: Finished difference Result 244024 states and 377300 transitions. [2020-07-20 12:34:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:34:09,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-20 12:34:09,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:34:09,862 INFO L225 Difference]: With dead ends: 244024 [2020-07-20 12:34:09,862 INFO L226 Difference]: Without dead ends: 184630 [2020-07-20 12:34:09,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:34:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184630 states. [2020-07-20 12:34:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184630 to 184628. [2020-07-20 12:34:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184628 states. [2020-07-20 12:34:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184628 states to 184628 states and 282430 transitions. [2020-07-20 12:34:25,641 INFO L78 Accepts]: Start accepts. Automaton has 184628 states and 282430 transitions. Word has length 339 [2020-07-20 12:34:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:34:25,642 INFO L479 AbstractCegarLoop]: Abstraction has 184628 states and 282430 transitions. [2020-07-20 12:34:25,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:34:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 184628 states and 282430 transitions. [2020-07-20 12:34:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 12:34:25,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:34:25,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:34:25,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:34:25,913 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:34:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:34:25,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1980174633, now seen corresponding path program 1 times [2020-07-20 12:34:25,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:34:25,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946118635] [2020-07-20 12:34:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:34:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:34:26,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 2079 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:34:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:34:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:34:26,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:34:26,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946118635] [2020-07-20 12:34:26,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:34:26,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:34:26,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908641277] [2020-07-20 12:34:26,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:34:26,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:34:26,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:34:26,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:34:26,639 INFO L87 Difference]: Start difference. First operand 184628 states and 282430 transitions. Second operand 4 states. [2020-07-20 12:34:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:34:53,545 INFO L93 Difference]: Finished difference Result 547709 states and 837283 transitions. [2020-07-20 12:34:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:34:53,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-20 12:34:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:34:54,032 INFO L225 Difference]: With dead ends: 547709 [2020-07-20 12:34:54,032 INFO L226 Difference]: Without dead ends: 363416 [2020-07-20 12:34:54,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:34:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363416 states. [2020-07-20 12:35:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363416 to 363414. [2020-07-20 12:35:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363414 states. [2020-07-20 12:35:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363414 states to 363414 states and 553136 transitions. [2020-07-20 12:35:24,630 INFO L78 Accepts]: Start accepts. Automaton has 363414 states and 553136 transitions. Word has length 339 [2020-07-20 12:35:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:35:24,630 INFO L479 AbstractCegarLoop]: Abstraction has 363414 states and 553136 transitions. [2020-07-20 12:35:24,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:35:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 363414 states and 553136 transitions. [2020-07-20 12:35:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 12:35:24,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:35:24,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:35:24,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:24,976 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:35:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:35:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 448011604, now seen corresponding path program 1 times [2020-07-20 12:35:24,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:35:24,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67656183] [2020-07-20 12:35:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:35:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:35:25,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:35:25,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:35:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:35:25,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:35:25,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67656183] [2020-07-20 12:35:25,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:35:25,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:35:25,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834649030] [2020-07-20 12:35:25,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:35:25,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:35:25,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:35:25,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:35:25,439 INFO L87 Difference]: Start difference. First operand 363414 states and 553136 transitions. Second operand 3 states. [2020-07-20 12:36:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:21,797 INFO L93 Difference]: Finished difference Result 1072659 states and 1632612 transitions. [2020-07-20 12:36:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:21,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-20 12:36:21,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:22,868 INFO L225 Difference]: With dead ends: 1072659 [2020-07-20 12:36:22,868 INFO L226 Difference]: Without dead ends: 710633 [2020-07-20 12:36:23,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710633 states. [2020-07-20 12:37:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710633 to 710631. [2020-07-20 12:37:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 710631 states. [2020-07-20 12:37:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710631 states to 710631 states and 1076559 transitions. [2020-07-20 12:37:34,237 INFO L78 Accepts]: Start accepts. Automaton has 710631 states and 1076559 transitions. Word has length 341 [2020-07-20 12:37:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:37:34,237 INFO L479 AbstractCegarLoop]: Abstraction has 710631 states and 1076559 transitions. [2020-07-20 12:37:34,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:37:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 710631 states and 1076559 transitions. [2020-07-20 12:37:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 12:37:34,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:37:34,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:37:34,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:34,714 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:37:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:37:34,715 INFO L82 PathProgramCache]: Analyzing trace with hash -3893075, now seen corresponding path program 1 times [2020-07-20 12:37:34,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:37:34,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914432692] [2020-07-20 12:37:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:37:35,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 2084 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:37:35,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:37:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:37:35,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:37:35,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914432692] [2020-07-20 12:37:35,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:37:35,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:37:35,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098527218] [2020-07-20 12:37:35,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:37:35,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:37:35,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:37:35,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:35,106 INFO L87 Difference]: Start difference. First operand 710631 states and 1076559 transitions. Second operand 3 states. [2020-07-20 12:39:11,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:39:11,535 INFO L93 Difference]: Finished difference Result 1618271 states and 2443525 transitions. [2020-07-20 12:39:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:39:11,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-20 12:39:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:39:13,292 INFO L225 Difference]: With dead ends: 1618271 [2020-07-20 12:39:13,293 INFO L226 Difference]: Without dead ends: 1119934 [2020-07-20 12:39:13,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:39:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119934 states. [2020-07-20 12:40:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119934 to 710374. [2020-07-20 12:40:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 710374 states. [2020-07-20 12:40:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710374 states to 710374 states and 1076123 transitions. [2020-07-20 12:40:36,169 INFO L78 Accepts]: Start accepts. Automaton has 710374 states and 1076123 transitions. Word has length 342 [2020-07-20 12:40:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:36,170 INFO L479 AbstractCegarLoop]: Abstraction has 710374 states and 1076123 transitions. [2020-07-20 12:40:36,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 710374 states and 1076123 transitions. [2020-07-20 12:40:36,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 12:40:36,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:36,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:36,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:36,663 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:36,664 INFO L82 PathProgramCache]: Analyzing trace with hash 685969943, now seen corresponding path program 1 times [2020-07-20 12:40:36,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:36,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196412419] [2020-07-20 12:40:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:37,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:37,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:37,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:37,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196412419] [2020-07-20 12:40:37,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:37,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:37,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482112219] [2020-07-20 12:40:37,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:37,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:37,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:37,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:37,955 INFO L87 Difference]: Start difference. First operand 710374 states and 1076123 transitions. Second operand 3 states.