/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.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:23:26,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:23:26,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:23:26,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:23:26,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:23:26,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:23:26,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:23:26,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:23:26,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:23:26,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:23:26,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:23:26,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:23:26,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:23:26,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:23:26,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:23:26,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:23:26,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:23:26,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:23:26,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:23:26,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:23:26,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:23:26,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:23:26,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:23:26,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:23:26,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:23:26,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:23:26,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:23:26,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:23:26,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:23:27,006 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:23:27,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:23:27,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:23:27,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:23:27,008 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:23:27,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:23:27,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:23:27,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:23:27,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:23:27,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:23:27,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:23:27,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:23:27,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:23:27,010 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:23:27,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:23:27,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:23:27,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:23:27,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:23:27,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:23:27,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:23:27,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:23:27,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:23:27,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:23:27,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:23:27,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:23:27,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:23:27,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:27,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:23:27,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:23:27,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 12:23:27,344 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:23:27,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:23:27,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:23:27,361 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:23:27,362 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:23:27,362 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 12:23:27,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c18a5603/f2f7db0f8b5b4e1bbbd94c704cb7a43a/FLAGf807052eb [2020-07-21 12:23:27,977 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:23:27,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 12:23:28,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c18a5603/f2f7db0f8b5b4e1bbbd94c704cb7a43a/FLAGf807052eb [2020-07-21 12:23:28,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c18a5603/f2f7db0f8b5b4e1bbbd94c704cb7a43a [2020-07-21 12:23:28,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:23:28,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:23:28,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:23:28,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:23:28,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:23:28,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:23:28" (1/1) ... [2020-07-21 12:23:28,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53314e70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:23:28, skipping insertion in model container [2020-07-21 12:23:28,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:23:28" (1/1) ... [2020-07-21 12:23:28,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:23:28,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:23:29,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:23:29,565 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:23:30,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:23:30,219 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:23:30,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:23:30 WrapperNode [2020-07-21 12:23:30,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:23:30,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:23:30,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:23:30,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:23:30,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:23:30" (1/1) ... [2020-07-21 12:23:30,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:23:30" (1/1) ... [2020-07-21 12:23:30,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:23:30" (1/1) ... [2020-07-21 12:23:30,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:23:30" (1/1) ... [2020-07-21 12:23:30,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:23:30" (1/1) ... [2020-07-21 12:23:30,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:23:30" (1/1) ... [2020-07-21 12:23:30,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:23:30" (1/1) ... [2020-07-21 12:23:30,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:23:30,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:23:30,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:23:30,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:23:30,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:23:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:23:30,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:23:30,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:23:30,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:23:30,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:23:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:23:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:23:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:23:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:23:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:23:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:23:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:23:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:23:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:23:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:23:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:23:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:23:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:23:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:23:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:23:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:23:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:23:32,891 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:23:32,892 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:23:32,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:23:32 BoogieIcfgContainer [2020-07-21 12:23:32,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:23:32,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:23:32,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:23:32,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:23:32,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:23:28" (1/3) ... [2020-07-21 12:23:32,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396972b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:23:32, skipping insertion in model container [2020-07-21 12:23:32,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:23:30" (2/3) ... [2020-07-21 12:23:32,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396972b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:23:32, skipping insertion in model container [2020-07-21 12:23:32,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:23:32" (3/3) ... [2020-07-21 12:23:32,925 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 12:23:32,940 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:23:32,958 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:23:32,977 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:23:33,020 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:23:33,021 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:23:33,021 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:23:33,021 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:23:33,021 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:23:33,021 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:23:33,022 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:23:33,022 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:23:33,073 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-21 12:23:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 12:23:33,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:33,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:33,131 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-21 12:23:33,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:33,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987962320] [2020-07-21 12:23:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:33,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:23:33,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:34,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:34,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987962320] [2020-07-21 12:23:34,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:34,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:34,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622273681] [2020-07-21 12:23:34,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:34,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:34,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:34,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:34,036 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-21 12:23:34,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:34,429 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-07-21 12:23:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:23:34,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 12:23:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:34,474 INFO L225 Difference]: With dead ends: 2333 [2020-07-21 12:23:34,475 INFO L226 Difference]: Without dead ends: 1545 [2020-07-21 12:23:34,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:23:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-07-21 12:23:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-07-21 12:23:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-07-21 12:23:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-07-21 12:23:34,647 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-07-21 12:23:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:34,649 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-07-21 12:23:34,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:34,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-07-21 12:23:34,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 12:23:34,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:34,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:34,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:34,870 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:34,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-07-21 12:23:34,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:34,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628806586] [2020-07-21 12:23:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:35,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:35,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:35,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:35,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628806586] [2020-07-21 12:23:35,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:35,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:35,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061184659] [2020-07-21 12:23:35,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:35,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:35,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:35,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:35,507 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 3 states. [2020-07-21 12:23:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:35,688 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-07-21 12:23:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:35,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 12:23:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:35,707 INFO L225 Difference]: With dead ends: 4438 [2020-07-21 12:23:35,707 INFO L226 Difference]: Without dead ends: 3024 [2020-07-21 12:23:35,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-07-21 12:23:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-07-21 12:23:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-07-21 12:23:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-07-21 12:23:35,834 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-07-21 12:23:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:35,835 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-07-21 12:23:35,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-07-21 12:23:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 12:23:35,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:35,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:36,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:36,061 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-07-21 12:23:36,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:36,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352598830] [2020-07-21 12:23:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:36,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:36,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:36,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:36,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352598830] [2020-07-21 12:23:36,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:36,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:36,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450699983] [2020-07-21 12:23:36,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:36,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:36,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:36,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:36,528 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 3 states. [2020-07-21 12:23:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:36,719 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-07-21 12:23:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:36,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 12:23:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:36,751 INFO L225 Difference]: With dead ends: 8991 [2020-07-21 12:23:36,751 INFO L226 Difference]: Without dead ends: 6011 [2020-07-21 12:23:36,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-07-21 12:23:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-07-21 12:23:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-07-21 12:23:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-07-21 12:23:36,980 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-07-21 12:23:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:36,981 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-07-21 12:23:36,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:36,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-07-21 12:23:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 12:23:36,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:36,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:37,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:37,196 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-07-21 12:23:37,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:37,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082010149] [2020-07-21 12:23:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:37,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:37,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:37,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082010149] [2020-07-21 12:23:37,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:37,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:37,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416610377] [2020-07-21 12:23:37,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:37,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:37,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:37,686 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 3 states. [2020-07-21 12:23:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:37,909 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-07-21 12:23:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:37,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 12:23:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:37,938 INFO L225 Difference]: With dead ends: 9010 [2020-07-21 12:23:37,938 INFO L226 Difference]: Without dead ends: 6029 [2020-07-21 12:23:37,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-07-21 12:23:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-07-21 12:23:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-07-21 12:23:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-07-21 12:23:38,126 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-07-21 12:23:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:38,127 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-07-21 12:23:38,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-07-21 12:23:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 12:23:38,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:38,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:38,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:38,357 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:38,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-07-21 12:23:38,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:38,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529557636] [2020-07-21 12:23:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:38,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:38,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:38,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529557636] [2020-07-21 12:23:38,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:38,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:38,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745773375] [2020-07-21 12:23:38,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:38,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:38,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:38,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:38,856 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 3 states. [2020-07-21 12:23:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:39,128 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-07-21 12:23:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:39,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 12:23:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:39,159 INFO L225 Difference]: With dead ends: 8718 [2020-07-21 12:23:39,160 INFO L226 Difference]: Without dead ends: 5904 [2020-07-21 12:23:39,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-07-21 12:23:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-07-21 12:23:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-07-21 12:23:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-07-21 12:23:39,413 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-07-21 12:23:39,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:39,415 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-07-21 12:23:39,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-07-21 12:23:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 12:23:39,432 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:39,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:39,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:39,647 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:39,648 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-07-21 12:23:39,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:39,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3682789] [2020-07-21 12:23:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:40,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 2108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:23:40,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:40,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:40,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3682789] [2020-07-21 12:23:40,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:40,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:40,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708106831] [2020-07-21 12:23:40,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:40,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:40,114 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 4 states. [2020-07-21 12:23:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:40,440 INFO L93 Difference]: Finished difference Result 16157 states and 24615 transitions. [2020-07-21 12:23:40,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:23:40,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 12:23:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:40,476 INFO L225 Difference]: With dead ends: 16157 [2020-07-21 12:23:40,476 INFO L226 Difference]: Without dead ends: 10795 [2020-07-21 12:23:40,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:23:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2020-07-21 12:23:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 6137. [2020-07-21 12:23:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6137 states. [2020-07-21 12:23:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 9444 transitions. [2020-07-21 12:23:40,850 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 9444 transitions. Word has length 328 [2020-07-21 12:23:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:40,851 INFO L479 AbstractCegarLoop]: Abstraction has 6137 states and 9444 transitions. [2020-07-21 12:23:40,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 9444 transitions. [2020-07-21 12:23:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:23:40,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:40,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:41,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:41,089 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:41,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1740117251, now seen corresponding path program 1 times [2020-07-21 12:23:41,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:41,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679962453] [2020-07-21 12:23:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:41,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 2113 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:41,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:41,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679962453] [2020-07-21 12:23:41,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:41,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:41,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573127292] [2020-07-21 12:23:41,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:41,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:41,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:41,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:41,490 INFO L87 Difference]: Start difference. First operand 6137 states and 9444 transitions. Second operand 3 states. [2020-07-21 12:23:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:41,957 INFO L93 Difference]: Finished difference Result 16841 states and 25613 transitions. [2020-07-21 12:23:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:41,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 12:23:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:41,981 INFO L225 Difference]: With dead ends: 16841 [2020-07-21 12:23:41,981 INFO L226 Difference]: Without dead ends: 11507 [2020-07-21 12:23:41,995 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 [2020-07-21 12:23:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2020-07-21 12:23:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 6241. [2020-07-21 12:23:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6241 states. [2020-07-21 12:23:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 9587 transitions. [2020-07-21 12:23:42,324 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 9587 transitions. Word has length 330 [2020-07-21 12:23:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:42,324 INFO L479 AbstractCegarLoop]: Abstraction has 6241 states and 9587 transitions. [2020-07-21 12:23:42,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 9587 transitions. [2020-07-21 12:23:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:23:42,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:42,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:42,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:42,562 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:42,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:42,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1227056241, now seen corresponding path program 1 times [2020-07-21 12:23:42,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:42,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343172352] [2020-07-21 12:23:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:42,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:23:42,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:43,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:43,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343172352] [2020-07-21 12:23:43,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:43,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:23:43,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069848651] [2020-07-21 12:23:43,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:23:43,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:43,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:23:43,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:23:43,175 INFO L87 Difference]: Start difference. First operand 6241 states and 9587 transitions. Second operand 8 states. [2020-07-21 12:23:45,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:45,268 INFO L93 Difference]: Finished difference Result 15832 states and 24500 transitions. [2020-07-21 12:23:45,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:23:45,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 330 [2020-07-21 12:23:45,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:45,294 INFO L225 Difference]: With dead ends: 15832 [2020-07-21 12:23:45,294 INFO L226 Difference]: Without dead ends: 11586 [2020-07-21 12:23:45,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:23:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2020-07-21 12:23:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 8093. [2020-07-21 12:23:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8093 states. [2020-07-21 12:23:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8093 states to 8093 states and 12299 transitions. [2020-07-21 12:23:45,753 INFO L78 Accepts]: Start accepts. Automaton has 8093 states and 12299 transitions. Word has length 330 [2020-07-21 12:23:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:45,753 INFO L479 AbstractCegarLoop]: Abstraction has 8093 states and 12299 transitions. [2020-07-21 12:23:45,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:23:45,753 INFO L276 IsEmpty]: Start isEmpty. Operand 8093 states and 12299 transitions. [2020-07-21 12:23:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 12:23:45,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:45,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:45,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:45,985 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:45,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1247460253, now seen corresponding path program 1 times [2020-07-21 12:23:45,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:45,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443001596] [2020-07-21 12:23:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:46,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:46,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:46,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:46,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443001596] [2020-07-21 12:23:46,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:46,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:46,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799220071] [2020-07-21 12:23:46,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:46,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:46,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:46,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:46,442 INFO L87 Difference]: Start difference. First operand 8093 states and 12299 transitions. Second operand 3 states. [2020-07-21 12:23:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:46,873 INFO L93 Difference]: Finished difference Result 16173 states and 24573 transitions. [2020-07-21 12:23:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:46,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 12:23:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:46,898 INFO L225 Difference]: With dead ends: 16173 [2020-07-21 12:23:46,898 INFO L226 Difference]: Without dead ends: 9971 [2020-07-21 12:23:46,911 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 [2020-07-21 12:23:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9971 states. [2020-07-21 12:23:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9971 to 8633. [2020-07-21 12:23:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8633 states. [2020-07-21 12:23:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 13191 transitions. [2020-07-21 12:23:47,391 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 13191 transitions. Word has length 330 [2020-07-21 12:23:47,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:47,391 INFO L479 AbstractCegarLoop]: Abstraction has 8633 states and 13191 transitions. [2020-07-21 12:23:47,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 13191 transitions. [2020-07-21 12:23:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 12:23:47,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:47,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:47,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:47,624 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:47,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:47,625 INFO L82 PathProgramCache]: Analyzing trace with hash -763365383, now seen corresponding path program 1 times [2020-07-21 12:23:47,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:47,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349470318] [2020-07-21 12:23:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:48,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:48,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:48,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349470318] [2020-07-21 12:23:48,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:48,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:48,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106533143] [2020-07-21 12:23:48,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:48,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:48,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:48,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:48,099 INFO L87 Difference]: Start difference. First operand 8633 states and 13191 transitions. Second operand 3 states. [2020-07-21 12:23:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:48,668 INFO L93 Difference]: Finished difference Result 24149 states and 36591 transitions. [2020-07-21 12:23:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:48,669 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 12:23:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:48,695 INFO L225 Difference]: With dead ends: 24149 [2020-07-21 12:23:48,696 INFO L226 Difference]: Without dead ends: 16416 [2020-07-21 12:23:48,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16416 states. [2020-07-21 12:23:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16416 to 8758. [2020-07-21 12:23:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8758 states. [2020-07-21 12:23:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 13337 transitions. [2020-07-21 12:23:49,340 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 13337 transitions. Word has length 331 [2020-07-21 12:23:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:49,340 INFO L479 AbstractCegarLoop]: Abstraction has 8758 states and 13337 transitions. [2020-07-21 12:23:49,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 13337 transitions. [2020-07-21 12:23:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 12:23:49,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:49,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:49,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:49,559 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:49,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2000347144, now seen corresponding path program 1 times [2020-07-21 12:23:49,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:49,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675457516] [2020-07-21 12:23:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:49,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 2123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:23:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:50,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:50,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675457516] [2020-07-21 12:23:50,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:50,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:23:50,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34641085] [2020-07-21 12:23:50,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:23:50,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:50,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:23:50,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:23:50,133 INFO L87 Difference]: Start difference. First operand 8758 states and 13337 transitions. Second operand 8 states. [2020-07-21 12:23:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:52,215 INFO L93 Difference]: Finished difference Result 19643 states and 30271 transitions. [2020-07-21 12:23:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:23:52,216 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-07-21 12:23:52,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:52,248 INFO L225 Difference]: With dead ends: 19643 [2020-07-21 12:23:52,248 INFO L226 Difference]: Without dead ends: 16573 [2020-07-21 12:23:52,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:23:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16573 states. [2020-07-21 12:23:52,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16573 to 10457. [2020-07-21 12:23:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10457 states. [2020-07-21 12:23:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10457 states to 10457 states and 15924 transitions. [2020-07-21 12:23:53,005 INFO L78 Accepts]: Start accepts. Automaton has 10457 states and 15924 transitions. Word has length 332 [2020-07-21 12:23:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:53,006 INFO L479 AbstractCegarLoop]: Abstraction has 10457 states and 15924 transitions. [2020-07-21 12:23:53,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:23:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 10457 states and 15924 transitions. [2020-07-21 12:23:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 12:23:53,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:53,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:53,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:53,227 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:53,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:53,228 INFO L82 PathProgramCache]: Analyzing trace with hash -160876658, now seen corresponding path program 1 times [2020-07-21 12:23:53,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:53,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532715153] [2020-07-21 12:23:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:53,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:53,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:53,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:53,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532715153] [2020-07-21 12:23:53,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:53,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:53,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444268183] [2020-07-21 12:23:53,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:53,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:53,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:53,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:53,667 INFO L87 Difference]: Start difference. First operand 10457 states and 15924 transitions. Second operand 3 states. [2020-07-21 12:23:54,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:54,964 INFO L93 Difference]: Finished difference Result 22162 states and 33933 transitions. [2020-07-21 12:23:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:54,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 12:23:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:54,985 INFO L225 Difference]: With dead ends: 22162 [2020-07-21 12:23:54,985 INFO L226 Difference]: Without dead ends: 14009 [2020-07-21 12:23:55,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14009 states. [2020-07-21 12:23:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14009 to 12559. [2020-07-21 12:23:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12559 states. [2020-07-21 12:23:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12559 states to 12559 states and 19294 transitions. [2020-07-21 12:23:55,648 INFO L78 Accepts]: Start accepts. Automaton has 12559 states and 19294 transitions. Word has length 332 [2020-07-21 12:23:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:55,648 INFO L479 AbstractCegarLoop]: Abstraction has 12559 states and 19294 transitions. [2020-07-21 12:23:55,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 12559 states and 19294 transitions. [2020-07-21 12:23:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 12:23:55,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:55,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:55,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:55,861 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:55,862 INFO L82 PathProgramCache]: Analyzing trace with hash 26974230, now seen corresponding path program 1 times [2020-07-21 12:23:55,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:55,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529528496] [2020-07-21 12:23:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:56,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 2115 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:23:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:56,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:56,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529528496] [2020-07-21 12:23:56,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:56,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:56,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070229301] [2020-07-21 12:23:56,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:56,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:56,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:56,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:56,283 INFO L87 Difference]: Start difference. First operand 12559 states and 19294 transitions. Second operand 4 states. [2020-07-21 12:23:56,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:56,869 INFO L93 Difference]: Finished difference Result 23174 states and 35485 transitions. [2020-07-21 12:23:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:23:56,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 12:23:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:56,884 INFO L225 Difference]: With dead ends: 23174 [2020-07-21 12:23:56,885 INFO L226 Difference]: Without dead ends: 11478 [2020-07-21 12:23:56,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:23:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11478 states. [2020-07-21 12:23:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11478 to 11458. [2020-07-21 12:23:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11458 states. [2020-07-21 12:23:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 17608 transitions. [2020-07-21 12:23:57,461 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 17608 transitions. Word has length 332 [2020-07-21 12:23:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:57,461 INFO L479 AbstractCegarLoop]: Abstraction has 11458 states and 17608 transitions. [2020-07-21 12:23:57,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 17608 transitions. [2020-07-21 12:23:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 12:23:57,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:57,471 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] [2020-07-21 12:23:57,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:57,672 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:57,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:57,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1537943031, now seen corresponding path program 1 times [2020-07-21 12:23:57,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:57,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015886372] [2020-07-21 12:23:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:58,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:23:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:58,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:58,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015886372] [2020-07-21 12:23:58,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:58,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:58,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014733870] [2020-07-21 12:23:58,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:58,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:58,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:58,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:58,243 INFO L87 Difference]: Start difference. First operand 11458 states and 17608 transitions. Second operand 4 states. [2020-07-21 12:23:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:59,334 INFO L93 Difference]: Finished difference Result 26120 states and 40662 transitions. [2020-07-21 12:23:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:23:59,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 12:23:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:59,357 INFO L225 Difference]: With dead ends: 26120 [2020-07-21 12:23:59,357 INFO L226 Difference]: Without dead ends: 20527 [2020-07-21 12:23:59,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20527 states. [2020-07-21 12:24:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20527 to 20525. [2020-07-21 12:24:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20525 states. [2020-07-21 12:24:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20525 states to 20525 states and 31568 transitions. [2020-07-21 12:24:00,471 INFO L78 Accepts]: Start accepts. Automaton has 20525 states and 31568 transitions. Word has length 333 [2020-07-21 12:24:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:24:00,472 INFO L479 AbstractCegarLoop]: Abstraction has 20525 states and 31568 transitions. [2020-07-21 12:24:00,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:24:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 20525 states and 31568 transitions. [2020-07-21 12:24:00,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 12:24:00,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:24:00,483 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] [2020-07-21 12:24:00,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:00,690 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:24:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:24:00,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1942664128, now seen corresponding path program 1 times [2020-07-21 12:24:00,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:24:00,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012772507] [2020-07-21 12:24:00,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:24:01,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 2125 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:24:01,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:24:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:24:01,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:24:01,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012772507] [2020-07-21 12:24:01,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:24:01,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:24:01,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801074094] [2020-07-21 12:24:01,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:24:01,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:24:01,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:24:01,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:24:01,305 INFO L87 Difference]: Start difference. First operand 20525 states and 31568 transitions. Second operand 4 states. [2020-07-21 12:24:03,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:03,396 INFO L93 Difference]: Finished difference Result 60368 states and 92806 transitions. [2020-07-21 12:24:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:24:03,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 12:24:03,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:03,439 INFO L225 Difference]: With dead ends: 60368 [2020-07-21 12:24:03,440 INFO L226 Difference]: Without dead ends: 39915 [2020-07-21 12:24:03,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:24:03,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39915 states. [2020-07-21 12:24:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39915 to 39913. [2020-07-21 12:24:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39913 states. [2020-07-21 12:24:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39913 states to 39913 states and 61083 transitions. [2020-07-21 12:24:06,747 INFO L78 Accepts]: Start accepts. Automaton has 39913 states and 61083 transitions. Word has length 333 [2020-07-21 12:24:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:24:06,747 INFO L479 AbstractCegarLoop]: Abstraction has 39913 states and 61083 transitions. [2020-07-21 12:24:06,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:24:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39913 states and 61083 transitions. [2020-07-21 12:24:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 12:24:06,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:24:06,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:24:06,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:06,966 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:24:06,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:24:06,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1906330768, now seen corresponding path program 1 times [2020-07-21 12:24:06,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:24:06,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050411696] [2020-07-21 12:24:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:24:07,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:24:07,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:24:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:24:07,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:24:07,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050411696] [2020-07-21 12:24:07,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:24:07,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:24:07,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310733921] [2020-07-21 12:24:07,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:24:07,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:24:07,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:24:07,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:24:07,671 INFO L87 Difference]: Start difference. First operand 39913 states and 61083 transitions. Second operand 3 states. [2020-07-21 12:24:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:11,833 INFO L93 Difference]: Finished difference Result 116533 states and 178115 transitions. [2020-07-21 12:24:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:24:11,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 12:24:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:11,921 INFO L225 Difference]: With dead ends: 116533 [2020-07-21 12:24:11,922 INFO L226 Difference]: Without dead ends: 77869 [2020-07-21 12:24:11,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:24:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77869 states. [2020-07-21 12:24:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77869 to 77867. [2020-07-21 12:24:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77867 states. [2020-07-21 12:24:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77867 states to 77867 states and 118696 transitions. [2020-07-21 12:24:17,693 INFO L78 Accepts]: Start accepts. Automaton has 77867 states and 118696 transitions. Word has length 335 [2020-07-21 12:24:17,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:24:17,694 INFO L479 AbstractCegarLoop]: Abstraction has 77867 states and 118696 transitions. [2020-07-21 12:24:17,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:24:17,694 INFO L276 IsEmpty]: Start isEmpty. Operand 77867 states and 118696 transitions. [2020-07-21 12:24:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 12:24:17,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:24:17,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:24:17,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:17,949 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:24:17,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:24:17,950 INFO L82 PathProgramCache]: Analyzing trace with hash -496610298, now seen corresponding path program 1 times [2020-07-21 12:24:17,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:24:17,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981190610] [2020-07-21 12:24:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:24:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 2129 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:24:18,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:24:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:24:18,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:24:18,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981190610] [2020-07-21 12:24:18,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:24:18,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:24:18,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134741018] [2020-07-21 12:24:18,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:24:18,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:24:18,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:24:18,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:24:18,487 INFO L87 Difference]: Start difference. First operand 77867 states and 118696 transitions. Second operand 8 states. [2020-07-21 12:24:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:30,830 INFO L93 Difference]: Finished difference Result 194089 states and 298278 transitions. [2020-07-21 12:24:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:24:30,831 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 336 [2020-07-21 12:24:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:31,061 INFO L225 Difference]: With dead ends: 194089 [2020-07-21 12:24:31,062 INFO L226 Difference]: Without dead ends: 174805 [2020-07-21 12:24:31,115 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 [2020-07-21 12:24:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174805 states. [2020-07-21 12:24:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174805 to 94535. [2020-07-21 12:24:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94535 states. [2020-07-21 12:24:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94535 states to 94535 states and 144036 transitions. [2020-07-21 12:24:37,550 INFO L78 Accepts]: Start accepts. Automaton has 94535 states and 144036 transitions. Word has length 336 [2020-07-21 12:24:37,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:24:37,550 INFO L479 AbstractCegarLoop]: Abstraction has 94535 states and 144036 transitions. [2020-07-21 12:24:37,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:24:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 94535 states and 144036 transitions. [2020-07-21 12:24:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 12:24:37,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:24:37,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:24:37,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:37,810 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:24:37,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:24:37,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1180141058, now seen corresponding path program 1 times [2020-07-21 12:24:37,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:24:37,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688708154] [2020-07-21 12:24:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:24:38,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:24:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:24:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:24:39,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:24:39,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688708154] [2020-07-21 12:24:39,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:24:39,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:24:39,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703581898] [2020-07-21 12:24:39,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:24:39,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:24:39,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:24:39,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:24:39,905 INFO L87 Difference]: Start difference. First operand 94535 states and 144036 transitions. Second operand 3 states. [2020-07-21 12:24:48,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:48,181 INFO L93 Difference]: Finished difference Result 227675 states and 348798 transitions. [2020-07-21 12:24:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:24:48,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 12:24:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:48,333 INFO L225 Difference]: With dead ends: 227675 [2020-07-21 12:24:48,333 INFO L226 Difference]: Without dead ends: 140329 [2020-07-21 12:24:48,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:24:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140329 states. [2020-07-21 12:24:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140329 to 127767. [2020-07-21 12:24:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127767 states. [2020-07-21 12:24:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127767 states to 127767 states and 195876 transitions. [2020-07-21 12:24:58,634 INFO L78 Accepts]: Start accepts. Automaton has 127767 states and 195876 transitions. Word has length 336 [2020-07-21 12:24:58,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:24:58,635 INFO L479 AbstractCegarLoop]: Abstraction has 127767 states and 195876 transitions. [2020-07-21 12:24:58,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:24:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 127767 states and 195876 transitions. [2020-07-21 12:24:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 12:24:58,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:24:58,670 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] [2020-07-21 12:24:58,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:58,871 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:24:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:24:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1940830443, now seen corresponding path program 1 times [2020-07-21 12:24:58,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:24:58,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643667653] [2020-07-21 12:24:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:24:59,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:24:59,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:24:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:24:59,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:24:59,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643667653] [2020-07-21 12:24:59,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:24:59,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:24:59,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318190355] [2020-07-21 12:24:59,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:24:59,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:24:59,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:24:59,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:24:59,363 INFO L87 Difference]: Start difference. First operand 127767 states and 195876 transitions. Second operand 3 states. [2020-07-21 12:25:17,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:25:17,521 INFO L93 Difference]: Finished difference Result 375740 states and 575792 transitions. [2020-07-21 12:25:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:25:17,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-21 12:25:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:25:17,899 INFO L225 Difference]: With dead ends: 375740 [2020-07-21 12:25:17,899 INFO L226 Difference]: Without dead ends: 249320 [2020-07-21 12:25:18,033 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 [2020-07-21 12:25:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249320 states. [2020-07-21 12:25:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249320 to 249318. [2020-07-21 12:25:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249318 states. [2020-07-21 12:25:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249318 states to 249318 states and 380307 transitions. [2020-07-21 12:25:42,858 INFO L78 Accepts]: Start accepts. Automaton has 249318 states and 380307 transitions. Word has length 337 [2020-07-21 12:25:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:25:42,858 INFO L479 AbstractCegarLoop]: Abstraction has 249318 states and 380307 transitions. [2020-07-21 12:25:42,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:25:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 249318 states and 380307 transitions. [2020-07-21 12:25:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 12:25:42,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:25:42,932 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] [2020-07-21 12:25:43,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:25:43,133 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:25:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:25:43,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1726977432, now seen corresponding path program 1 times [2020-07-21 12:25:43,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:25:43,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428310875] [2020-07-21 12:25:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:25:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:25:43,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:25:43,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:25:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:25:43,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:25:43,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428310875] [2020-07-21 12:25:43,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:25:43,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:25:43,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045798174] [2020-07-21 12:25:43,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:25:43,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:25:43,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:25:43,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:25:43,554 INFO L87 Difference]: Start difference. First operand 249318 states and 380307 transitions. Second operand 4 states. [2020-07-21 12:26:18,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:26:18,214 INFO L93 Difference]: Finished difference Result 678958 states and 1033574 transitions. [2020-07-21 12:26:18,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:26:18,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-21 12:26:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:26:18,824 INFO L225 Difference]: With dead ends: 678958 [2020-07-21 12:26:18,825 INFO L226 Difference]: Without dead ends: 432932 [2020-07-21 12:26:19,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:26:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432932 states. [2020-07-21 12:26:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432932 to 243898. [2020-07-21 12:26:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243898 states. [2020-07-21 12:26:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243898 states to 243898 states and 371825 transitions. [2020-07-21 12:26:47,512 INFO L78 Accepts]: Start accepts. Automaton has 243898 states and 371825 transitions. Word has length 337 [2020-07-21 12:26:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:47,512 INFO L479 AbstractCegarLoop]: Abstraction has 243898 states and 371825 transitions. [2020-07-21 12:26:47,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:26:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 243898 states and 371825 transitions. [2020-07-21 12:26:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 12:26:47,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:47,591 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] [2020-07-21 12:26:47,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:47,792 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash 494961172, now seen corresponding path program 1 times [2020-07-21 12:26:47,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:47,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45226687] [2020-07-21 12:26:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:48,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:26:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:26:48,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:48,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45226687] [2020-07-21 12:26:48,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:48,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:26:48,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2288088] [2020-07-21 12:26:48,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:26:48,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:48,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:26:48,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:48,244 INFO L87 Difference]: Start difference. First operand 243898 states and 371825 transitions. Second operand 3 states. [2020-07-21 12:27:25,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:25,202 INFO L93 Difference]: Finished difference Result 675356 states and 1028070 transitions. [2020-07-21 12:27:25,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:27:25,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-21 12:27:25,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:25,891 INFO L225 Difference]: With dead ends: 675356 [2020-07-21 12:27:25,891 INFO L226 Difference]: Without dead ends: 442178 [2020-07-21 12:27:26,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442178 states. [2020-07-21 12:27:54,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442178 to 244379. [2020-07-21 12:27:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244379 states. [2020-07-21 12:27:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244379 states to 244379 states and 372423 transitions. [2020-07-21 12:27:54,971 INFO L78 Accepts]: Start accepts. Automaton has 244379 states and 372423 transitions. Word has length 340 [2020-07-21 12:27:54,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:54,972 INFO L479 AbstractCegarLoop]: Abstraction has 244379 states and 372423 transitions. [2020-07-21 12:27:54,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:27:54,972 INFO L276 IsEmpty]: Start isEmpty. Operand 244379 states and 372423 transitions. [2020-07-21 12:27:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 12:27:55,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:55,046 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] [2020-07-21 12:27:55,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:55,247 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:55,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1233391883, now seen corresponding path program 1 times [2020-07-21 12:27:55,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:55,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124191795] [2020-07-21 12:27:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:55,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 2143 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:27:55,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:27:55,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:55,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124191795] [2020-07-21 12:27:55,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:55,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:27:55,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650041369] [2020-07-21 12:27:55,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:27:55,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:55,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:27:55,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:55,657 INFO L87 Difference]: Start difference. First operand 244379 states and 372423 transitions. Second operand 3 states. [2020-07-21 12:28:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:28:34,976 INFO L93 Difference]: Finished difference Result 668702 states and 1027223 transitions. [2020-07-21 12:28:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:28:34,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 12:28:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:28:35,693 INFO L225 Difference]: With dead ends: 668702 [2020-07-21 12:28:35,693 INFO L226 Difference]: Without dead ends: 436857 [2020-07-21 12:28:35,942 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 [2020-07-21 12:28:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436857 states. [2020-07-21 12:29:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436857 to 382255. [2020-07-21 12:29:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382255 states. [2020-07-21 12:29:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382255 states to 382255 states and 595672 transitions. [2020-07-21 12:29:17,731 INFO L78 Accepts]: Start accepts. Automaton has 382255 states and 595672 transitions. Word has length 341 [2020-07-21 12:29:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:17,732 INFO L479 AbstractCegarLoop]: Abstraction has 382255 states and 595672 transitions. [2020-07-21 12:29:17,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 382255 states and 595672 transitions. [2020-07-21 12:29:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 12:29:17,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:17,812 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] [2020-07-21 12:29:18,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:18,012 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:18,013 INFO L82 PathProgramCache]: Analyzing trace with hash -253048940, now seen corresponding path program 1 times [2020-07-21 12:29:18,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:18,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834555216] [2020-07-21 12:29:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:18,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 2139 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:29:18,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:18,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:18,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834555216] [2020-07-21 12:29:18,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:18,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:29:18,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837037814] [2020-07-21 12:29:18,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:29:18,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:18,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:29:18,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:29:18,432 INFO L87 Difference]: Start difference. First operand 382255 states and 595672 transitions. Second operand 4 states. [2020-07-21 12:29:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:54,079 INFO L93 Difference]: Finished difference Result 718230 states and 1118171 transitions. [2020-07-21 12:29:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:29:54,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2020-07-21 12:29:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:54,621 INFO L225 Difference]: With dead ends: 718230 [2020-07-21 12:29:54,621 INFO L226 Difference]: Without dead ends: 341287 [2020-07-21 12:29:54,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:29:55,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341287 states. [2020-07-21 12:30:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341287 to 340960. [2020-07-21 12:30:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340960 states. [2020-07-21 12:30:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340960 states to 340960 states and 530438 transitions. [2020-07-21 12:30:30,822 INFO L78 Accepts]: Start accepts. Automaton has 340960 states and 530438 transitions. Word has length 341 [2020-07-21 12:30:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:30,822 INFO L479 AbstractCegarLoop]: Abstraction has 340960 states and 530438 transitions. [2020-07-21 12:30:30,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:30:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 340960 states and 530438 transitions. [2020-07-21 12:30:30,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 12:30:30,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:30,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:30:31,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:31,094 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:31,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:31,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1057024975, now seen corresponding path program 1 times [2020-07-21 12:30:31,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:31,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054685869] [2020-07-21 12:30:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:31,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:30:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:30:31,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:31,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054685869] [2020-07-21 12:30:31,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:31,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:30:31,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544882713] [2020-07-21 12:30:31,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:30:31,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:31,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:30:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:30:31,514 INFO L87 Difference]: Start difference. First operand 340960 states and 530438 transitions. Second operand 3 states. [2020-07-21 12:31:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:31:32,841 INFO L93 Difference]: Finished difference Result 994710 states and 1546472 transitions. [2020-07-21 12:31:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:31:32,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 12:31:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:31:33,977 INFO L225 Difference]: With dead ends: 994710 [2020-07-21 12:31:33,978 INFO L226 Difference]: Without dead ends: 665512 [2020-07-21 12:31:34,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:31:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665512 states. [2020-07-21 12:32:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665512 to 665510. [2020-07-21 12:32:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665510 states. [2020-07-21 12:32:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665510 states to 665510 states and 1027052 transitions. [2020-07-21 12:32:50,190 INFO L78 Accepts]: Start accepts. Automaton has 665510 states and 1027052 transitions. Word has length 342 [2020-07-21 12:32:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:32:50,190 INFO L479 AbstractCegarLoop]: Abstraction has 665510 states and 1027052 transitions. [2020-07-21 12:32:50,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:32:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 665510 states and 1027052 transitions. [2020-07-21 12:32:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 12:32:50,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:32:50,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:32:50,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:50,532 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:32:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:32:50,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1023408404, now seen corresponding path program 1 times [2020-07-21 12:32:50,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:32:50,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287986208] [2020-07-21 12:32:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:32:50,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 12:32:50,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:32:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:32:52,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:32:52,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287986208] [2020-07-21 12:32:52,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:32:52,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 12:32:52,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436504381] [2020-07-21 12:32:52,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 12:32:52,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:32:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 12:32:52,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:32:52,256 INFO L87 Difference]: Start difference. First operand 665510 states and 1027052 transitions. Second operand 9 states.