/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.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:20:52,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:20:52,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:20:52,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:20:52,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:20:52,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:20:52,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:20:52,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:20:52,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:20:52,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:20:52,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:20:52,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:20:52,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:20:52,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:20:52,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:20:52,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:20:52,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:20:52,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:20:52,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:20:52,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:20:52,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:20:52,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:20:52,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:20:52,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:20:52,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:20:52,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:20:52,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:20:52,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:20:52,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:20:52,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-21 12:20:52,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:20:52,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:20:52,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:20:52,713 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 12:20:52,727 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:20:52,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:20:52,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:20:52,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:20:52,729 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:20:52,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:20:52,730 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:20:52,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:20:52,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:20:52,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:20:52,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:20:52,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:20:52,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:20:52,731 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:20:52,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:20:52,731 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:20:52,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:20:52,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:20:52,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:20:52,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:20:52,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:20:52,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:20:52,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:20:52,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:20:52,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:20:52,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:20:52,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:52,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:20:52,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:20:52,734 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 12:20:53,025 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:20:53,038 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:20:53,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:20:53,043 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:20:53,044 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:20:53,044 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:20:53,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367b0d61b/f17f33f5b8904f8aab1e09bda5195f68/FLAGa7026f971 [2020-07-21 12:20:53,764 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:20:53,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:20:53,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367b0d61b/f17f33f5b8904f8aab1e09bda5195f68/FLAGa7026f971 [2020-07-21 12:20:53,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367b0d61b/f17f33f5b8904f8aab1e09bda5195f68 [2020-07-21 12:20:53,968 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:20:53,971 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:20:53,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:20:53,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:20:53,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:20:53,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:20:53" (1/1) ... [2020-07-21 12:20:53,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51833862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:53, skipping insertion in model container [2020-07-21 12:20:53,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:20:53" (1/1) ... [2020-07-21 12:20:53,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:20:54,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:20:55,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:20:55,181 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:20:55,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:20:55,649 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:20:55,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:55 WrapperNode [2020-07-21 12:20:55,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:20:55,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:20:55,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:20:55,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:20:55,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:55" (1/1) ... [2020-07-21 12:20:55,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:55" (1/1) ... [2020-07-21 12:20:55,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:55" (1/1) ... [2020-07-21 12:20:55,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:55" (1/1) ... [2020-07-21 12:20:55,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:55" (1/1) ... [2020-07-21 12:20:55,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:55" (1/1) ... [2020-07-21 12:20:55,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:55" (1/1) ... [2020-07-21 12:20:55,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:20:55,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:20:55,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:20:55,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:20:55,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:55" (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 12:20:55,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:20:55,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:20:55,967 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:20:55,967 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:20:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:20:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:20:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 12:20:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:20:55,969 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:20:55,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:20:55,969 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:20:55,970 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:20:55,970 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:20:55,971 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:20:55,971 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:20:55,972 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:20:55,972 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:20:55,972 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:20:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:20:55,974 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:20:55,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:20:55,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:20:58,674 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:20:58,674 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:20:58,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:20:58 BoogieIcfgContainer [2020-07-21 12:20:58,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:20:58,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:20:58,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:20:58,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:20:58,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:20:53" (1/3) ... [2020-07-21 12:20:58,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49bb7a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:20:58, skipping insertion in model container [2020-07-21 12:20:58,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:55" (2/3) ... [2020-07-21 12:20:58,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49bb7a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:20:58, skipping insertion in model container [2020-07-21 12:20:58,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:20:58" (3/3) ... [2020-07-21 12:20:58,692 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 12:20:58,704 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:20:58,713 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:20:58,728 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:20:58,756 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:20:58,756 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:20:58,756 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:20:58,757 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:20:58,757 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:20:58,757 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:20:58,757 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:20:58,757 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:20:58,792 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-07-21 12:20:58,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-21 12:20:58,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:58,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:20:58,818 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:58,824 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-07-21 12:20:58,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:58,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493467256] [2020-07-21 12:20:58,832 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 12:20:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:59,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 2039 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:20:59,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:59,583 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 12:20:59,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:59,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493467256] [2020-07-21 12:20:59,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:59,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:59,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516009334] [2020-07-21 12:20:59,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:59,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:59,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:59,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:59,610 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 3 states. [2020-07-21 12:20:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:59,932 INFO L93 Difference]: Finished difference Result 1140 states and 1981 transitions. [2020-07-21 12:20:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:59,934 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-21 12:20:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:59,961 INFO L225 Difference]: With dead ends: 1140 [2020-07-21 12:20:59,961 INFO L226 Difference]: Without dead ends: 973 [2020-07-21 12:20:59,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 12:20:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-07-21 12:21:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 971. [2020-07-21 12:21:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 971 states. [2020-07-21 12:21:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1536 transitions. [2020-07-21 12:21:00,135 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1536 transitions. Word has length 318 [2020-07-21 12:21:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:00,140 INFO L479 AbstractCegarLoop]: Abstraction has 971 states and 1536 transitions. [2020-07-21 12:21:00,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1536 transitions. [2020-07-21 12:21:00,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-21 12:21:00,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:00,156 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] [2020-07-21 12:21:00,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:00,372 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:00,374 INFO L82 PathProgramCache]: Analyzing trace with hash -566193409, now seen corresponding path program 1 times [2020-07-21 12:21:00,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:00,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302604948] [2020-07-21 12:21:00,375 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 12:21:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:00,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 2040 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:21:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:00,892 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 12:21:00,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:00,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302604948] [2020-07-21 12:21:00,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:00,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:00,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204492162] [2020-07-21 12:21:00,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:00,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:00,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:00,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:00,897 INFO L87 Difference]: Start difference. First operand 971 states and 1536 transitions. Second operand 3 states. [2020-07-21 12:21:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:01,088 INFO L93 Difference]: Finished difference Result 1980 states and 3152 transitions. [2020-07-21 12:21:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:01,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-21 12:21:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:01,100 INFO L225 Difference]: With dead ends: 1980 [2020-07-21 12:21:01,100 INFO L226 Difference]: Without dead ends: 1621 [2020-07-21 12:21:01,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 12:21:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2020-07-21 12:21:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1615. [2020-07-21 12:21:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1615 states. [2020-07-21 12:21:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2552 transitions. [2020-07-21 12:21:01,169 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2552 transitions. Word has length 318 [2020-07-21 12:21:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:01,170 INFO L479 AbstractCegarLoop]: Abstraction has 1615 states and 2552 transitions. [2020-07-21 12:21:01,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2552 transitions. [2020-07-21 12:21:01,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-21 12:21:01,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:01,177 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] [2020-07-21 12:21:01,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:01,393 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:01,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1708782165, now seen corresponding path program 1 times [2020-07-21 12:21:01,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:01,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805291935] [2020-07-21 12:21:01,395 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 12:21:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:01,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 2040 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:21:01,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:01,914 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 12:21:01,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:01,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805291935] [2020-07-21 12:21:01,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:01,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:01,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360881579] [2020-07-21 12:21:01,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:01,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:01,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:01,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:01,931 INFO L87 Difference]: Start difference. First operand 1615 states and 2552 transitions. Second operand 3 states. [2020-07-21 12:21:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:02,230 INFO L93 Difference]: Finished difference Result 3566 states and 5678 transitions. [2020-07-21 12:21:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:02,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-21 12:21:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:02,251 INFO L225 Difference]: With dead ends: 3566 [2020-07-21 12:21:02,251 INFO L226 Difference]: Without dead ends: 2865 [2020-07-21 12:21:02,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 12:21:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2020-07-21 12:21:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2861. [2020-07-21 12:21:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2861 states. [2020-07-21 12:21:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4513 transitions. [2020-07-21 12:21:02,392 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4513 transitions. Word has length 318 [2020-07-21 12:21:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:02,392 INFO L479 AbstractCegarLoop]: Abstraction has 2861 states and 4513 transitions. [2020-07-21 12:21:02,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4513 transitions. [2020-07-21 12:21:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-21 12:21:02,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:02,405 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] [2020-07-21 12:21:02,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:02,619 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:02,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-07-21 12:21:02,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:02,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338549139] [2020-07-21 12:21:02,620 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 12:21:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:02,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 2041 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:21:02,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:03,089 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 12:21:03,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:03,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338549139] [2020-07-21 12:21:03,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:03,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:03,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731127496] [2020-07-21 12:21:03,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:03,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:03,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:03,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:03,093 INFO L87 Difference]: Start difference. First operand 2861 states and 4513 transitions. Second operand 3 states. [2020-07-21 12:21:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:03,428 INFO L93 Difference]: Finished difference Result 6627 states and 10550 transitions. [2020-07-21 12:21:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:03,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-21 12:21:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:03,461 INFO L225 Difference]: With dead ends: 6627 [2020-07-21 12:21:03,461 INFO L226 Difference]: Without dead ends: 5351 [2020-07-21 12:21:03,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 12:21:03,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2020-07-21 12:21:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 5345. [2020-07-21 12:21:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5345 states. [2020-07-21 12:21:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5345 states to 5345 states and 8418 transitions. [2020-07-21 12:21:03,764 INFO L78 Accepts]: Start accepts. Automaton has 5345 states and 8418 transitions. Word has length 318 [2020-07-21 12:21:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:03,765 INFO L479 AbstractCegarLoop]: Abstraction has 5345 states and 8418 transitions. [2020-07-21 12:21:03,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 5345 states and 8418 transitions. [2020-07-21 12:21:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-21 12:21:03,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:03,776 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] [2020-07-21 12:21:03,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:03,990 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:03,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:03,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-07-21 12:21:03,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:03,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982192572] [2020-07-21 12:21:03,992 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 12:21:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:04,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 2042 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:21:04,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:04,640 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 12:21:04,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:04,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982192572] [2020-07-21 12:21:04,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:04,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:04,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219288818] [2020-07-21 12:21:04,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:04,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:04,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:04,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:04,643 INFO L87 Difference]: Start difference. First operand 5345 states and 8418 transitions. Second operand 3 states. [2020-07-21 12:21:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:05,018 INFO L93 Difference]: Finished difference Result 12705 states and 20210 transitions. [2020-07-21 12:21:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:05,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-21 12:21:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:05,070 INFO L225 Difference]: With dead ends: 12705 [2020-07-21 12:21:05,071 INFO L226 Difference]: Without dead ends: 10260 [2020-07-21 12:21:05,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 12:21:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10260 states. [2020-07-21 12:21:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10260 to 10250. [2020-07-21 12:21:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10250 states. [2020-07-21 12:21:05,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10250 states to 10250 states and 16118 transitions. [2020-07-21 12:21:05,465 INFO L78 Accepts]: Start accepts. Automaton has 10250 states and 16118 transitions. Word has length 318 [2020-07-21 12:21:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:05,466 INFO L479 AbstractCegarLoop]: Abstraction has 10250 states and 16118 transitions. [2020-07-21 12:21:05,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 10250 states and 16118 transitions. [2020-07-21 12:21:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-21 12:21:05,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:05,485 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] [2020-07-21 12:21:05,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:05,700 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-07-21 12:21:05,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:05,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3851917] [2020-07-21 12:21:05,702 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 12:21:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:06,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 2043 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:21:06,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:06,260 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 12:21:06,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:06,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3851917] [2020-07-21 12:21:06,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:06,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:21:06,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157485723] [2020-07-21 12:21:06,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:21:06,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:06,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:21:06,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:06,264 INFO L87 Difference]: Start difference. First operand 10250 states and 16118 transitions. Second operand 4 states. [2020-07-21 12:21:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:07,026 INFO L93 Difference]: Finished difference Result 30322 states and 47641 transitions. [2020-07-21 12:21:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:21:07,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-21 12:21:07,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:07,087 INFO L225 Difference]: With dead ends: 30322 [2020-07-21 12:21:07,087 INFO L226 Difference]: Without dead ends: 20085 [2020-07-21 12:21:07,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 315 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 12:21:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20085 states. [2020-07-21 12:21:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20085 to 20083. [2020-07-21 12:21:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20083 states. [2020-07-21 12:21:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20083 states to 20083 states and 31402 transitions. [2020-07-21 12:21:07,855 INFO L78 Accepts]: Start accepts. Automaton has 20083 states and 31402 transitions. Word has length 318 [2020-07-21 12:21:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:07,856 INFO L479 AbstractCegarLoop]: Abstraction has 20083 states and 31402 transitions. [2020-07-21 12:21:07,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:21:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 20083 states and 31402 transitions. [2020-07-21 12:21:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-21 12:21:07,887 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:07,888 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] [2020-07-21 12:21:08,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:08,102 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:08,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:08,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1929233080, now seen corresponding path program 1 times [2020-07-21 12:21:08,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:08,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100762521] [2020-07-21 12:21:08,103 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 12:21:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:08,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:08,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:08,641 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 12:21:08,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:08,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100762521] [2020-07-21 12:21:08,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:08,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:08,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442671209] [2020-07-21 12:21:08,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:08,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:08,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:08,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:08,643 INFO L87 Difference]: Start difference. First operand 20083 states and 31402 transitions. Second operand 3 states. [2020-07-21 12:21:09,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:09,568 INFO L93 Difference]: Finished difference Result 59285 states and 92581 transitions. [2020-07-21 12:21:09,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:09,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-21 12:21:09,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:09,655 INFO L225 Difference]: With dead ends: 59285 [2020-07-21 12:21:09,655 INFO L226 Difference]: Without dead ends: 39342 [2020-07-21 12:21:09,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 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 12:21:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39342 states. [2020-07-21 12:21:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39342 to 39340. [2020-07-21 12:21:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39340 states. [2020-07-21 12:21:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39340 states to 39340 states and 61150 transitions. [2020-07-21 12:21:11,998 INFO L78 Accepts]: Start accepts. Automaton has 39340 states and 61150 transitions. Word has length 320 [2020-07-21 12:21:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:11,998 INFO L479 AbstractCegarLoop]: Abstraction has 39340 states and 61150 transitions. [2020-07-21 12:21:11,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 39340 states and 61150 transitions. [2020-07-21 12:21:12,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-21 12:21:12,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:12,053 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] [2020-07-21 12:21:12,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:12,266 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:12,266 INFO L82 PathProgramCache]: Analyzing trace with hash -752458947, now seen corresponding path program 1 times [2020-07-21 12:21:12,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:12,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375547434] [2020-07-21 12:21:12,267 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 12:21:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:12,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:12,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:12,676 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 12:21:12,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:12,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375547434] [2020-07-21 12:21:12,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:12,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:12,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723348024] [2020-07-21 12:21:12,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:12,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:12,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:12,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:12,680 INFO L87 Difference]: Start difference. First operand 39340 states and 61150 transitions. Second operand 3 states. [2020-07-21 12:21:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:14,297 INFO L93 Difference]: Finished difference Result 117861 states and 183174 transitions. [2020-07-21 12:21:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:14,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-21 12:21:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:14,442 INFO L225 Difference]: With dead ends: 117861 [2020-07-21 12:21:14,443 INFO L226 Difference]: Without dead ends: 78548 [2020-07-21 12:21:14,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 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 12:21:14,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78548 states. [2020-07-21 12:21:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78548 to 39351. [2020-07-21 12:21:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39351 states. [2020-07-21 12:21:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39351 states to 39351 states and 61165 transitions. [2020-07-21 12:21:17,433 INFO L78 Accepts]: Start accepts. Automaton has 39351 states and 61165 transitions. Word has length 320 [2020-07-21 12:21:17,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:17,433 INFO L479 AbstractCegarLoop]: Abstraction has 39351 states and 61165 transitions. [2020-07-21 12:21:17,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 39351 states and 61165 transitions. [2020-07-21 12:21:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-21 12:21:17,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:17,468 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] [2020-07-21 12:21:17,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:17,669 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:17,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1043368483, now seen corresponding path program 1 times [2020-07-21 12:21:17,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:17,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098485097] [2020-07-21 12:21:17,671 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 12:21:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:17,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:18,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:18,060 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 12:21:18,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:18,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098485097] [2020-07-21 12:21:18,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:18,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:18,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088180121] [2020-07-21 12:21:18,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:18,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:18,063 INFO L87 Difference]: Start difference. First operand 39351 states and 61165 transitions. Second operand 3 states. [2020-07-21 12:21:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:19,820 INFO L93 Difference]: Finished difference Result 117958 states and 183341 transitions. [2020-07-21 12:21:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:19,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 321 [2020-07-21 12:21:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:19,934 INFO L225 Difference]: With dead ends: 117958 [2020-07-21 12:21:19,935 INFO L226 Difference]: Without dead ends: 78657 [2020-07-21 12:21:19,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 319 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 12:21:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78657 states. [2020-07-21 12:21:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78657 to 39367. [2020-07-21 12:21:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39367 states. [2020-07-21 12:21:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39367 states to 39367 states and 61184 transitions. [2020-07-21 12:21:21,220 INFO L78 Accepts]: Start accepts. Automaton has 39367 states and 61184 transitions. Word has length 321 [2020-07-21 12:21:21,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:21,221 INFO L479 AbstractCegarLoop]: Abstraction has 39367 states and 61184 transitions. [2020-07-21 12:21:21,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:21,221 INFO L276 IsEmpty]: Start isEmpty. Operand 39367 states and 61184 transitions. [2020-07-21 12:21:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 12:21:21,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:21,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:21,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:21,440 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash 131987891, now seen corresponding path program 1 times [2020-07-21 12:21:21,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:21,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113568157] [2020-07-21 12:21:21,442 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 12:21:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:21,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:23,014 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 12:21:23,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:23,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113568157] [2020-07-21 12:21:23,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:23,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:23,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673984125] [2020-07-21 12:21:23,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:23,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:23,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:23,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:23,016 INFO L87 Difference]: Start difference. First operand 39367 states and 61184 transitions. Second operand 3 states. [2020-07-21 12:21:24,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:24,689 INFO L93 Difference]: Finished difference Result 111877 states and 173639 transitions. [2020-07-21 12:21:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:24,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 322 [2020-07-21 12:21:24,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:24,762 INFO L225 Difference]: With dead ends: 111877 [2020-07-21 12:21:24,763 INFO L226 Difference]: Without dead ends: 72707 [2020-07-21 12:21:24,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72707 states. [2020-07-21 12:21:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72707 to 72705. [2020-07-21 12:21:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72705 states. [2020-07-21 12:21:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72705 states to 72705 states and 112234 transitions. [2020-07-21 12:21:27,063 INFO L78 Accepts]: Start accepts. Automaton has 72705 states and 112234 transitions. Word has length 322 [2020-07-21 12:21:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:27,064 INFO L479 AbstractCegarLoop]: Abstraction has 72705 states and 112234 transitions. [2020-07-21 12:21:27,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 72705 states and 112234 transitions. [2020-07-21 12:21:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 12:21:27,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:27,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:27,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:27,323 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:27,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:27,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1165677968, now seen corresponding path program 1 times [2020-07-21 12:21:27,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:27,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367403265] [2020-07-21 12:21:27,326 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 12:21:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:27,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:21:27,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:27,734 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 12:21:27,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:27,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367403265] [2020-07-21 12:21:27,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:27,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:21:27,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329225035] [2020-07-21 12:21:27,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:21:27,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:27,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:21:27,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:27,742 INFO L87 Difference]: Start difference. First operand 72705 states and 112234 transitions. Second operand 4 states. [2020-07-21 12:21:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:32,273 INFO L93 Difference]: Finished difference Result 212637 states and 328014 transitions. [2020-07-21 12:21:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:21:32,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-21 12:21:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:32,437 INFO L225 Difference]: With dead ends: 212637 [2020-07-21 12:21:32,437 INFO L226 Difference]: Without dead ends: 140438 [2020-07-21 12:21:32,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 319 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 12:21:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140438 states. [2020-07-21 12:21:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140438 to 72954. [2020-07-21 12:21:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72954 states. [2020-07-21 12:21:35,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72954 states to 72954 states and 112653 transitions. [2020-07-21 12:21:35,514 INFO L78 Accepts]: Start accepts. Automaton has 72954 states and 112653 transitions. Word has length 322 [2020-07-21 12:21:35,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:35,514 INFO L479 AbstractCegarLoop]: Abstraction has 72954 states and 112653 transitions. [2020-07-21 12:21:35,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:21:35,514 INFO L276 IsEmpty]: Start isEmpty. Operand 72954 states and 112653 transitions. [2020-07-21 12:21:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 12:21:35,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:35,551 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 12:21:35,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:35,752 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:35,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:35,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1127817642, now seen corresponding path program 1 times [2020-07-21 12:21:35,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:35,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480182066] [2020-07-21 12:21:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:21:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:36,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:21:36,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:36,401 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 12:21:36,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:36,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480182066] [2020-07-21 12:21:36,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:36,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:21:36,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825871231] [2020-07-21 12:21:36,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:21:36,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:36,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:21:36,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:21:36,405 INFO L87 Difference]: Start difference. First operand 72954 states and 112653 transitions. Second operand 8 states. [2020-07-21 12:21:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:47,413 INFO L93 Difference]: Finished difference Result 273514 states and 429137 transitions. [2020-07-21 12:21:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:21:47,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 324 [2020-07-21 12:21:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:47,650 INFO L225 Difference]: With dead ends: 273514 [2020-07-21 12:21:47,650 INFO L226 Difference]: Without dead ends: 202499 [2020-07-21 12:21:47,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 317 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 12:21:47,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202499 states. [2020-07-21 12:21:55,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202499 to 115822. [2020-07-21 12:21:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115822 states. [2020-07-21 12:21:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115822 states to 115822 states and 177989 transitions. [2020-07-21 12:21:55,862 INFO L78 Accepts]: Start accepts. Automaton has 115822 states and 177989 transitions. Word has length 324 [2020-07-21 12:21:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:55,863 INFO L479 AbstractCegarLoop]: Abstraction has 115822 states and 177989 transitions. [2020-07-21 12:21:55,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:21:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand 115822 states and 177989 transitions. [2020-07-21 12:21:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 12:21:55,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:55,908 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 12:21:56,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:56,109 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:56,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1367810770, now seen corresponding path program 1 times [2020-07-21 12:21:56,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:56,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582467063] [2020-07-21 12:21:56,111 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 12:21:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:56,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 2058 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:56,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:56,501 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 12:21:56,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:56,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582467063] [2020-07-21 12:21:56,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:56,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:56,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169914551] [2020-07-21 12:21:56,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:56,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:56,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:56,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:56,503 INFO L87 Difference]: Start difference. First operand 115822 states and 177989 transitions. Second operand 3 states. [2020-07-21 12:22:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:05,985 INFO L93 Difference]: Finished difference Result 282743 states and 435793 transitions. [2020-07-21 12:22:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:05,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 12:22:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:06,182 INFO L225 Difference]: With dead ends: 282743 [2020-07-21 12:22:06,182 INFO L226 Difference]: Without dead ends: 168580 [2020-07-21 12:22:06,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 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 12:22:06,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168580 states. [2020-07-21 12:22:16,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168580 to 147138. [2020-07-21 12:22:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147138 states. [2020-07-21 12:22:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147138 states to 147138 states and 227553 transitions. [2020-07-21 12:22:16,229 INFO L78 Accepts]: Start accepts. Automaton has 147138 states and 227553 transitions. Word has length 324 [2020-07-21 12:22:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:16,229 INFO L479 AbstractCegarLoop]: Abstraction has 147138 states and 227553 transitions. [2020-07-21 12:22:16,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 147138 states and 227553 transitions. [2020-07-21 12:22:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 12:22:16,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:16,272 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 12:22:16,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:16,478 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash 480416705, now seen corresponding path program 1 times [2020-07-21 12:22:16,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:16,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218774475] [2020-07-21 12:22:16,480 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 12:22:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:16,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:16,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:16,855 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 12:22:16,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:16,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218774475] [2020-07-21 12:22:16,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:16,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:16,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396945778] [2020-07-21 12:22:16,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:16,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:16,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:16,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:16,857 INFO L87 Difference]: Start difference. First operand 147138 states and 227553 transitions. Second operand 3 states. [2020-07-21 12:22:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:29,952 INFO L93 Difference]: Finished difference Result 439902 states and 680010 transitions. [2020-07-21 12:22:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:29,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-21 12:22:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:30,336 INFO L225 Difference]: With dead ends: 439902 [2020-07-21 12:22:30,336 INFO L226 Difference]: Without dead ends: 293527 [2020-07-21 12:22:30,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 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 12:22:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293527 states. [2020-07-21 12:22:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293527 to 147242. [2020-07-21 12:22:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147242 states. [2020-07-21 12:22:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147242 states to 147242 states and 227689 transitions. [2020-07-21 12:22:43,423 INFO L78 Accepts]: Start accepts. Automaton has 147242 states and 227689 transitions. Word has length 324 [2020-07-21 12:22:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:43,423 INFO L479 AbstractCegarLoop]: Abstraction has 147242 states and 227689 transitions. [2020-07-21 12:22:43,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 147242 states and 227689 transitions. [2020-07-21 12:22:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-07-21 12:22:43,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:43,466 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] [2020-07-21 12:22:43,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:43,666 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:43,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:43,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1136142015, now seen corresponding path program 1 times [2020-07-21 12:22:43,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:43,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419170064] [2020-07-21 12:22:43,668 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 12:22:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:44,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 2056 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:44,064 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 12:22:44,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:44,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419170064] [2020-07-21 12:22:44,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:44,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:44,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079239013] [2020-07-21 12:22:44,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:44,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:44,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:44,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:44,072 INFO L87 Difference]: Start difference. First operand 147242 states and 227689 transitions. Second operand 3 states. [2020-07-21 12:23:02,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:02,877 INFO L93 Difference]: Finished difference Result 440035 states and 680175 transitions. [2020-07-21 12:23:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:02,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 325 [2020-07-21 12:23:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:03,282 INFO L225 Difference]: With dead ends: 440035 [2020-07-21 12:23:03,282 INFO L226 Difference]: Without dead ends: 293647 [2020-07-21 12:23:03,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 323 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 12:23:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293647 states. [2020-07-21 12:23:12,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293647 to 147384. [2020-07-21 12:23:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147384 states. [2020-07-21 12:23:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147384 states to 147384 states and 227860 transitions. [2020-07-21 12:23:13,109 INFO L78 Accepts]: Start accepts. Automaton has 147384 states and 227860 transitions. Word has length 325 [2020-07-21 12:23:13,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:13,109 INFO L479 AbstractCegarLoop]: Abstraction has 147384 states and 227860 transitions. [2020-07-21 12:23:13,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 147384 states and 227860 transitions. [2020-07-21 12:23:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 12:23:13,156 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:13,156 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] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (16)] Forcibly destroying the process [2020-07-21 12:23:13,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:13,747 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:13,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:13,748 INFO L82 PathProgramCache]: Analyzing trace with hash -624663126, now seen corresponding path program 1 times [2020-07-21 12:23:13,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:13,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997516835] [2020-07-21 12:23:13,748 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 12:23:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:14,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:23:14,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:14,316 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 12:23:14,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:14,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997516835] [2020-07-21 12:23:14,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:14,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:23:14,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971126689] [2020-07-21 12:23:14,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:23:14,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:14,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:23:14,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:23:14,318 INFO L87 Difference]: Start difference. First operand 147384 states and 227860 transitions. Second operand 8 states. [2020-07-21 12:23:44,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:44,135 INFO L93 Difference]: Finished difference Result 495924 states and 772646 transitions. [2020-07-21 12:23:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:23:44,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 326 [2020-07-21 12:23:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:45,323 INFO L225 Difference]: With dead ends: 495924 [2020-07-21 12:23:45,323 INFO L226 Difference]: Without dead ends: 431518 [2020-07-21 12:23:45,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 319 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 12:23:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431518 states. [2020-07-21 12:24:07,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431518 to 228578. [2020-07-21 12:24:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228578 states. [2020-07-21 12:24:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228578 states to 228578 states and 353154 transitions. [2020-07-21 12:24:08,068 INFO L78 Accepts]: Start accepts. Automaton has 228578 states and 353154 transitions. Word has length 326 [2020-07-21 12:24:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:24:08,069 INFO L479 AbstractCegarLoop]: Abstraction has 228578 states and 353154 transitions. [2020-07-21 12:24:08,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:24:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 228578 states and 353154 transitions. [2020-07-21 12:24:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 12:24:08,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:24:08,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:24:08,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:08,339 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:24:08,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:24:08,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1110795874, now seen corresponding path program 1 times [2020-07-21 12:24:08,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:24:08,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515798922] [2020-07-21 12:24:08,341 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 12:24:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:24:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:24:08,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:24:08,743 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 12:24:08,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:24:08,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515798922] [2020-07-21 12:24:08,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:24:08,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:24:08,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757681573] [2020-07-21 12:24:08,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:24:08,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:24:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:24:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:24:08,745 INFO L87 Difference]: Start difference. First operand 228578 states and 353154 transitions. Second operand 3 states. [2020-07-21 12:24:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:33,354 INFO L93 Difference]: Finished difference Result 562171 states and 870818 transitions. [2020-07-21 12:24:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:24:33,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 12:24:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:33,877 INFO L225 Difference]: With dead ends: 562171 [2020-07-21 12:24:33,878 INFO L226 Difference]: Without dead ends: 335646 [2020-07-21 12:24:34,757 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 12:24:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335646 states. [2020-07-21 12:25:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335646 to 299996. [2020-07-21 12:25:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299996 states. [2020-07-21 12:25:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299996 states to 299996 states and 462140 transitions. [2020-07-21 12:25:02,779 INFO L78 Accepts]: Start accepts. Automaton has 299996 states and 462140 transitions. Word has length 326 [2020-07-21 12:25:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:25:02,779 INFO L479 AbstractCegarLoop]: Abstraction has 299996 states and 462140 transitions. [2020-07-21 12:25:02,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:25:02,779 INFO L276 IsEmpty]: Start isEmpty. Operand 299996 states and 462140 transitions. [2020-07-21 12:25:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 12:25:02,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:25:02,848 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 12:25:03,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:25:03,049 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:25:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:25:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2129040620, now seen corresponding path program 1 times [2020-07-21 12:25:03,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:25:03,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370189152] [2020-07-21 12:25:03,050 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 12:25:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:25:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:25:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:25:03,511 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 12:25:03,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:25:03,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370189152] [2020-07-21 12:25:03,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:25:03,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:25:03,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64314151] [2020-07-21 12:25:03,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:25:03,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:25:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:25:03,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:25:03,513 INFO L87 Difference]: Start difference. First operand 299996 states and 462140 transitions. Second operand 4 states. [2020-07-21 12:25:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:25:54,486 INFO L93 Difference]: Finished difference Result 890167 states and 1370612 transitions. [2020-07-21 12:25:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:25:54,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 12:25:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:25:55,514 INFO L225 Difference]: With dead ends: 890167 [2020-07-21 12:25:55,514 INFO L226 Difference]: Without dead ends: 590506 [2020-07-21 12:25:55,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 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 12:25:56,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590506 states. [2020-07-21 12:26:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590506 to 590504. [2020-07-21 12:26:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590504 states. [2020-07-21 12:26:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590504 states to 590504 states and 905150 transitions. [2020-07-21 12:26:48,257 INFO L78 Accepts]: Start accepts. Automaton has 590504 states and 905150 transitions. Word has length 326 [2020-07-21 12:26:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:48,257 INFO L479 AbstractCegarLoop]: Abstraction has 590504 states and 905150 transitions. [2020-07-21 12:26:48,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:26:48,258 INFO L276 IsEmpty]: Start isEmpty. Operand 590504 states and 905150 transitions. [2020-07-21 12:26:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 12:26:48,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:48,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:26:48,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:48,592 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1579408490, now seen corresponding path program 1 times [2020-07-21 12:26:48,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:48,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584987354] [2020-07-21 12:26:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:26:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:26:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:49,008 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 12:26:49,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:49,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584987354] [2020-07-21 12:26:49,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:49,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:26:49,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131926738] [2020-07-21 12:26:49,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:26:49,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:49,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:26:49,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:49,010 INFO L87 Difference]: Start difference. First operand 590504 states and 905150 transitions. Second operand 3 states. [2020-07-21 12:28:32,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:28:32,330 INFO L93 Difference]: Finished difference Result 1745700 states and 2672398 transitions. [2020-07-21 12:28:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:28:32,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 12:28:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:28:34,227 INFO L225 Difference]: With dead ends: 1745700 [2020-07-21 12:28:34,228 INFO L226 Difference]: Without dead ends: 1155745 [2020-07-21 12:28:34,702 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 12:28:36,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155745 states. [2020-07-21 12:30:30,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155745 to 1155743. [2020-07-21 12:30:30,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1155743 states.